用的HMCL3.2.149，3.3.166和PCL1.0.9。

不用Forge直接下载

报错之类的发一下，还有你是安装失败还是安装成功后启动失败？

用HMCL自动安装后文件总是损坏

不安装forge能不能启动，上传日志

可以，但现在又不能安装Forge了，切换了下载源也没用，官网下载的也不行！

你要点我左下角的回复回复我，不然我看不到，上传崩溃日志

好的，稍等一下。

没有日志，说是文件损坏。

换下载源
换到MCBBS
重新下载。

尝试清理libraries文件夹，然后将HMCL的下载源换另一个（就是和你原来设置的不一样）

重新下载核心，去forge官网下载
或者直接用这个整合包https://www.mcbbs.net/thread-869469-1-1.html
有帮助可以给最佳支持一下，谢谢

libraries文件夹在哪？

也用过这个整合包，就是Forge的启动失败

这个整合包里面有启动器的，用他的启动器，已经帮你安装好forge了

.minecraft文件夹里明显地摆着

你有没有试过重新下载

找到了，怎么清理？全部删除吗？

https://c-t.work/s/f41518b04a714b
我这里用HMCL安装没问题啊...你可以直接用我的 打包上传了

当然试过，就是不行

谢谢大佬！可以了。

可是为什么一添加模组就崩溃
崩溃日志：
Command: "C:\\Program Files\\Java\\jdk1.8.0_131\\jre\\bin\\java.exe" -Dminecraft.client.jar=.minecraft\versions\1.15.2\1.15.2.jar -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=16M -XX:-UseAdaptiveSizePolicy -XX:-OmitStackTraceInFastThrow -Xmn128m -Xmx2048m -Dfml.ignoreInvalidMinecraftCertificates=true -Dfml.ignorePatchDiscrepancies=true -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Djava.library.path=C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\versions\1.15.2\natives -Dminecraft.launcher.brand=HMCL -Dminecraft.launcher.version=3.3.166 -cp C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\net\minecraftforge\forge\1.15.2-31.1.41\forge-1.15.2-31.1.41.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\org\ow2\asm\asm\7.2\asm-7.2.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\org\ow2\asm\asm-commons\7.2\asm-commons-7.2.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\org\ow2\asm\asm-tree\7.2\asm-tree-7.2.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\cpw\mods\modlauncher\5.0.0-milestone.4\modlauncher-5.0.0-milestone.4.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\cpw\mods\grossjava9hacks\1.1.0\grossjava9hacks-1.1.0.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\net\minecraftforge\accesstransformers\2.0.4-shadowed\accesstransformers-2.0.4-shadowed.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\net\minecraftforge\eventbus\2.0.0-milestone.1-service\eventbus-2.0.0-milestone.1-service.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\net\minecraftforge\forgespi\2.0.0-milestone.1\forgespi-2.0.0-milestone.1.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\net\minecraftforge\coremods\2.0.0-milestone.1\coremods-2.0.0-milestone.1.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\net\minecraftforge\unsafe\0.2.0\unsafe-0.2.0.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\com\electronwill\night-config\core\3.6.2\core-3.6.2.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\com\electronwill\night-config\toml\3.6.2\toml-3.6.2.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\org\jline\jline\3.12.1\jline-3.12.1.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\org\apache\maven\maven-artifact\3.6.0\maven-artifact-3.6.0.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\net\jodah\typetools\0.6.1\typetools-0.6.1.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\org\apache\logging\log4j\log4j-api\2.11.2\log4j-api-2.11.2.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\org\apache\logging\log4j\log4j-core\2.11.2\log4j-core-2.11.2.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\net\minecrell\terminalconsoleappender\1.2.0\terminalconsoleappender-1.2.0.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\5.0.4\jopt-simple-5.0.4.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\com\mojang\patchy\1.1\patchy-1.1.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\oshi-project\oshi-core\1.1\oshi-core-1.1.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\net\java\dev\jna\jna\4.4.0\jna-4.4.0.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\net\java\dev\jna\platform\3.4.0\platform-3.4.0.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\com\ibm\icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\com\mojang\javabridge\1.0.22\javabridge-1.0.22.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\io\netty\netty-all\4.1.25.Final\netty-all-4.1.25.Final.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\com\google\guava\guava\21.0\guava-21.0.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\org\apache\commons\commons-lang3\3.5\commons-lang3-3.5.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\commons-io\commons-io\2.5\commons-io-2.5.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\commons-codec\commons-codec\1.10\commons-codec-1.10.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\com\mojang\brigadier\1.0.17\brigadier-1.0.17.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\com\mojang\datafixerupper\2.0.24\datafixerupper-2.0.24.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\com\google\code\gson\gson\2.8.0\gson-2.8.0.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\com\mojang\authlib\1.5.25\authlib-1.5.25.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\org\apache\commons\commons-compress\1.8.1\commons-compress-1.8.1.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\org\apache\httpcomponents\httpclient\4.3.3\httpclient-4.3.3.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\commons-logging\commons-logging\1.1.3\commons-logging-1.1.3.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\org\apache\httpcomponents\httpcore\4.3.2\httpcore-4.3.2.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\it\unimi\dsi\fastutil\8.2.1\fastutil-8.2.1.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\org\lwjgl\lwjgl\3.2.2\lwjgl-3.2.2.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\org\lwjgl\lwjgl-jemalloc\3.2.2\lwjgl-jemalloc-3.2.2.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\org\lwjgl\lwjgl-openal\3.2.2\lwjgl-openal-3.2.2.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\org\lwjgl\lwjgl-opengl\3.2.2\lwjgl-opengl-3.2.2.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\org\lwjgl\lwjgl-glfw\3.2.2\lwjgl-glfw-3.2.2.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\org\lwjgl\lwjgl-stb\3.2.2\lwjgl-stb-3.2.2.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\org\lwjgl\lwjgl-tinyfd\3.2.2\lwjgl-tinyfd-3.2.2.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\libraries\com\mojang\text2speech\1.11.3\text2speech-1.11.3.jar;C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\versions\1.15.2\1.15.2.jar cpw.mods.modlauncher.Launcher --username Li_Zhihang --version "HMCL 3.3.166" --gameDir C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft --assetsDir C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\assets --assetIndex 1.15 --uuid a4f1e8ca5b4e3a538528009d038faf4c --accessToken 52af5581e85144899749c230efc17c88 --userType mojang --versionType "HMCL 3.3.166" --width 854 --height 480 --launchTarget fmlclient --fml.forgeVersion 31.1.41 --fml.mcVersion 1.15.2 --fml.forgeGroup net.minecraftforge --fml.mcpVersion 20200307.202953
2020-04-22 10:21:22,285 main WARN Advanced terminal features are not available in this environment
[10:21:22] [main/INFO] [cp.mo.mo.Launcher/MODLAUNCHER]: ModLauncher running: args [--username, <player>, --version, HMCL 3.3.166, --gameDir, C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft, --assetsDir, C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\assets, --assetIndex, 1.15, --uuid, <uuid>, --accessToken, ????????, --userType, mojang, --versionType, HMCL 3.3.166, --width, 854, --height, 480, --launchTarget, fmlclient, --fml.forgeVersion, 31.1.41, --fml.mcVersion, 1.15.2, --fml.forgeGroup, net.minecraftforge, --fml.mcpVersion, 20200307.202953]
[10:21:22] [main/INFO] [cp.mo.mo.Launcher/MODLAUNCHER]: ModLauncher 5.0.0-milestone.4+67+b1a340b starting: java version 1.8.0_131 by Oracle Corporation
[10:21:22] [main/INFO] [op.OptiFineTransformationService/]: OptiFineTransformationService.onLoad
[10:21:22] [main/INFO] [op.OptiFineTransformationService/]: OptiFine ZIP file: C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\mods\[高清修复]-OptiFine.jar
[10:21:24] [main/INFO] [ne.mi.fm.lo.FixSSL/CORE]: Added Lets Encrypt root certificates as additional trust
[10:21:24] [main/INFO] [op.OptiFineTransformationService/]: OptiFineTransformationService.initialize
[10:21:25] [main/WARN] [ne.mi.fm.lo.mo.ModFileParser/LOADING]: Mod file Mod File: C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\mods\[布_API]-Fabric.jar is missing mods.toml file
[10:21:25] [main/WARN] [ne.mi.fm.lo.mo.ModDiscoverer/SCAN]: File C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\mods\[布_API]-Fabric.jar has been ignored - it is invalid
[10:21:25] [main/WARN] [ne.mi.fm.lo.mo.ModFileParser/LOADING]: Mod file Mod File: C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\mods\方块中的世界.jar is missing mods.toml file
[10:21:25] [main/WARN] [ne.mi.fm.lo.mo.ModDiscoverer/SCAN]: File C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\mods\方块中的世界.jar has been ignored - it is invalid
[10:21:25] [main/WARN] [ne.mi.fm.lo.mo.ModFileParser/LOADING]: Mod file Mod File: C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\mods\等价交换.jar is missing mods.toml file
[10:21:25] [main/WARN] [ne.mi.fm.lo.mo.ModDiscoverer/SCAN]: File C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\mods\等价交换.jar has been ignored - it is invalid
[10:21:26] [main/INFO] [op.OptiFineTransformationService/]: OptiFineTransformationService.transformers
[10:21:26] [main/INFO] [op.OptiFineTransformer/]: Targets: 275
[10:21:27] [main/INFO] [op.OptiFineTransformationService/]: additionalClassesLocator: [optifine., net.optifine.]
[10:21:27] [main/INFO] [cp.mo.mo.LaunchServiceHandler/MODLAUNCHER]: Launching target 'fmlclient' with arguments [--version, HMCL 3.3.166, --gameDir, C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft, --assetsDir, C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\assets, --uuid, <uuid>, --username, <player>, --assetIndex, 1.15, --accessToken, ????????, --userType, mojang, --versionType, HMCL 3.3.166, --width, 854, --height, 480]
[10:21:29] [main/INFO] [ne.op.re.Reflector/]: [OptiFine] *** Reflector Forge ***
[10:21:29] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Class not present: mods.betterfoliage.client.BetterFoliageClient
[10:21:30] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Constructor not present: net.minecraftforge.client.event.EntityViewRenderEvent$FogColors, params: class net.minecraft.client.renderer.FogRenderer, class net.minecraft.client.renderer.GameRenderer, class net.minecraft.client.renderer.ActiveRenderInfo, double, float, float, float
[10:21:31] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Constructor not present: net.minecraftforge.client.event.EntityViewRenderEvent$RenderFogEvent, params: class net.minecraft.client.renderer.FogRenderer, class net.minecraft.client.renderer.GameRenderer, class net.minecraft.client.renderer.ActiveRenderInfo, double, int, float
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]: java.lang.ExceptionInInitializerError
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at net.minecraftforge.registries.NamespacedDefaultedWrapper$Factory.onCreate(NamespacedDefaultedWrapper.java:154)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at net.minecraftforge.registries.RegistryBuilder.lambda$getCreate$2(RegistryBuilder.java:228)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at net.minecraftforge.registries.ForgeRegistry.<init>(ForgeRegistry.java:127)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at net.minecraftforge.registries.RegistryManager.createRegistry(RegistryManager.java:134)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at net.minecraftforge.registries.RegistryBuilder.create(RegistryBuilder.java:184)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at net.minecraftforge.registries.GameData.init(GameData.java:176)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at net.minecraftforge.registries.GameData.<clinit>(GameData.java:160)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at net.minecraft.block.Block.<clinit>(Block.java:81)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at net.minecraft.block.Blocks.<clinit>(Blocks.java:19)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at net.minecraft.item.Items.<clinit>(Items.java:17)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at net.minecraft.client.renderer.ItemRenderer.<clinit>(ItemRenderer.java:56)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at net.minecraft.client.renderer.RenderType.<clinit>(RenderType.java:35)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at net.optifine.render.RenderTypes.<clinit>(RenderTypes.java:13)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at net.minecraft.client.renderer.BlockModelRenderer.<clinit>(BlockModelRenderer.java:58)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at java.lang.Class.forName0(Native Method)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at java.lang.Class.forName(Class.java:264)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at net.optifine.reflect.ReflectorClass.getTargetClass(ReflectorClass.java:49)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at net.optifine.reflect.ReflectorClass.<init>(ReflectorClass.java:28)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at net.optifine.reflect.ReflectorClass.<init>(ReflectorClass.java:18)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at net.optifine.reflect.Reflector.<clinit>(Reflector.java:211)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at net.minecraft.crash.CrashReport.func_71504_g(CrashReport.java:101)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at net.minecraft.crash.CrashReport.<init>(CrashReport.java:54)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at net.minecraft.crash.CrashReport.func_230188_h_(CrashReport.java:414)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at net.minecraft.client.main.Main.main(SourceFile:129)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at java.lang.reflect.Method.invoke(Method.java:498)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:56)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at cpw.mods.modlauncher.Launcher.run(Launcher.java:81)
[10:21:34] [main/INFO] [STDERR/]: [net.optifine.reflect.ReflectorClass:getTargetClass:57]:         at cpw.mods.modlauncher.Launcher.main(Launcher.java:65)
[10:21:34] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:634]: Caused by: java.lang.NullPointerException: Attempted to get vanilla wrapper for unknown registry: class net.minecraft.util.SoundEvent
[10:21:34] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:634]:         at org.apache.commons.lang3.Validate.notNull(Validate.java:225)
[10:21:34] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:634]:         at net.minecraftforge.registries.GameData.getWrapper(GameData.java:241)
[10:21:34] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:634]:         at net.minecraft.util.registry.Registry.forge(Registry.java:252)
[10:21:34] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:634]:         at net.minecraft.util.registry.Registry.<clinit>(Registry.java:81)
[10:21:34] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:634]:         ... 34 more
[10:21:35] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Method not present: net.minecraftforge.common.extensions.IForgeBlockState.getLightValue
[10:21:38] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Method not present: net.minecraftforge.client.ForgeHooksClient.applyTransform
[10:21:38] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Method not present: net.minecraftforge.client.ForgeHooksClient.applyUVLock
[10:21:38] [main/WARN] [ne.op.Log/]: [OptiFine] (Reflector) More than one method found: net.minecraftforge.client.ForgeHooksClient.dispatchRenderLast
[10:21:38] [main/WARN] [ne.op.Log/]: [OptiFine] (Reflector)  - public static void net.minecraftforge.client.ForgeHooksClient.dispatchRenderLast(net.minecraft.client.renderer.WorldRenderer,com.mojang.blaze3d.matrix.MatrixStack,float)
[10:21:38] [main/WARN] [ne.op.Log/]: [OptiFine] (Reflector)  - public static void net.minecraftforge.client.ForgeHooksClient.dispatchRenderLast(net.minecraft.client.renderer.WorldRenderer,com.mojang.blaze3d.matrix.MatrixStack,float,net.minecraft.client.renderer.Matrix4f,long)
[10:21:38] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Method not present: net.minecraftforge.client.ForgeHooksClient.getDamageModel
[10:21:38] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Method not present: net.minecraftforge.client.ForgeHooksClient.getMatrix
[10:21:38] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Method not present: net.minecraftforge.client.ForgeHooksClient.putQuadColor
[10:21:38] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Method not present: net.minecraftforge.client.ForgeHooksClient.renderFirstPersonHand
[10:21:38] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Method not present: net.minecraftforge.client.ForgeHooksClient.renderLitItem
[10:21:38] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Method not present: net.minecraftforge.client.ForgeHooksClient.transform
[10:21:39] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Field not present: net.minecraftforge.common.ForgeConfig$Client.allowEmissiveItems
[10:21:39] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Method not present: net.minecraftforge.common.extensions.IForgeItem.getTileEntityItemStackRenderer
[10:21:39] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Class not present: net.minecraftforge.client.model.IModel
[10:21:39] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Field not present: net.minecraftforge.common.ForgeMod.forgeLightPipelineEnabled
[10:21:39] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Method not present: net.minecraft.client.renderer.model.BlockModelDefinition.fromJson
[10:21:39] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Method not present: net.minecraft.client.renderer.vertex.VertexFormatElement$Usage.preDraw
[10:21:39] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Method not present: net.minecraft.client.renderer.vertex.VertexFormatElement$Usage.postDraw
[10:21:39] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Field not found: World.tileEntitiesToBeRemoved
[10:21:39] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Class not present: net.minecraftforge.fml.client.gui.GuiModList
[10:21:39] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Class not present: net.minecraft.launchwrapper.Launch
[10:21:39] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Field not present: net.minecraftforge.client.model.pipeline.LightUtil.itemConsumer
[10:21:39] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Method not present: net.minecraftforge.client.model.pipeline.LightUtil.renderQuadColor
[10:21:39] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Field not present: net.minecraftforge.client.model.pipeline.LightUtil.tessellator
[10:21:39] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Class not present: net.minecraftforge.fml.common.Loader
[10:21:40] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Constructor not present: net.minecraftforge.client.event.RenderItemInFrameEvent, params: class net.minecraft.entity.item.ItemFrameEntity, class net.minecraft.client.renderer.entity.ItemFrameRenderer
[10:21:40] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Constructor not present: net.minecraftforge.client.event.RenderLivingEvent$Pre, params: class net.minecraft.entity.LivingEntity, class net.minecraft.client.renderer.entity.LivingRenderer, float, double, double, double
[10:21:40] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Constructor not present: net.minecraftforge.client.event.RenderLivingEvent$Post, params: class net.minecraft.entity.LivingEntity, class net.minecraft.client.renderer.entity.LivingRenderer, float, double, double, double
[10:21:40] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Class not present: net.minecraftforge.client.event.RenderLivingEvent$Specials$Pre
[10:21:40] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Class not present: net.minecraftforge.client.event.RenderLivingEvent$Specials$Post
[10:21:40] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Class not present: net.minecraftforge.fml.client.SplashProgress
[10:21:40] [main/INFO] [ne.op.re.Reflector/]: [OptiFine] *** Reflector Vanilla ***
[10:21:40] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Field not present: net.minecraft.client.renderer.entity.model.BoatModel.(type: class [Lnet.minecraft.client.renderer.model.ModelRenderer;, index: 1)
[10:21:40] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Field not present: net.minecraft.client.renderer.entity.EnderCrystalRenderer.(type: class net.minecraft.client.renderer.entity.model.EntityModel, index: 0)
[10:21:40] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Field not present: net.minecraft.client.renderer.entity.EnderCrystalRenderer.(type: class net.minecraft.client.renderer.entity.model.EntityModel, index: 1)
[10:21:40] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Field not present: net.minecraft.client.renderer.entity.model.GhastModel.(type: class net.minecraft.client.renderer.model.ModelRenderer, index: 0)
[10:21:40] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Field not present: net.minecraft.client.renderer.entity.model.IllagerModel.(type: class net.minecraft.client.renderer.model.ModelRenderer, index: 8)
[10:21:40] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Field not present: net.minecraft.client.renderer.entity.model.PhantomModel.(type: class net.minecraft.client.renderer.model.ModelRenderer, index: 7)
[10:21:40] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Field not present: net.minecraft.client.renderer.entity.model.SalmonModel.(type: class net.minecraft.client.renderer.model.ModelRenderer, index: 5)
[10:21:40] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Field not present: net.minecraft.client.renderer.entity.model.SalmonModel.(type: class net.minecraft.client.renderer.model.ModelRenderer, index: 6)
[10:21:40] [main/INFO] [ne.op.Log/]: [OptiFine] (Reflector) Field not present: net.minecraft.client.renderer.entity.model.SalmonModel.(type: class net.minecraft.client.renderer.model.ModelRenderer, index: 7)
[10:21:41] [Render thread/INFO] [minecraft/Minecraft]: Setting user: <player>
[10:21:41] [Render thread/INFO] [STDOUT/]: [net.minecraft.util.registry.Bootstrap:func_179870_a:103]: ---- Minecraft Crash Report ----
// Hey, that tickles! Hehehe!

Time: 20-4-22 上午10:21
Description: Initializing game

java.lang.NoClassDefFoundError: Could not initialize class net.minecraft.util.registry.Registry
        at net.minecraft.util.registry.Bootstrap.func_151354_b(Bootstrap.java:34) ~[?:?] {re:classloading}
        at net.minecraft.client.Minecraft.<init>(Minecraft.java:353) ~[?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
        at net.minecraft.client.main.Main.main(SourceFile:166) ~[1.15.2.jar:?] {re:classloading}
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_131] {}
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_131] {}
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_131] {}
        at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_131] {}
        at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:56) ~[forge-1.15.2-31.1.41.jar:31.1] {}
        at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-5.0.0-milestone.4.jar:?] {}
        at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-5.0.0-milestone.4.jar:?] {}
        at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-5.0.0-milestone.4.jar:?] {}
        at cpw.mods.modlauncher.Launcher.run(Launcher.java:81) [modlauncher-5.0.0-milestone.4.jar:?] {}
        at cpw.mods.modlauncher.Launcher.main(Launcher.java:65) [modlauncher-5.0.0-milestone.4.jar:?] {}


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Thread: Render thread
Stacktrace:
        at net.minecraft.util.registry.Bootstrap.func_151354_b(Bootstrap.java:34)
        at net.minecraft.client.Minecraft.<init>(Minecraft.java:353)

-- Initialization --
Details:
Stacktrace:
        at net.minecraft.client.main.Main.main(SourceFile:166)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:56)
        at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37)
        at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54)
        at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72)
        at cpw.mods.modlauncher.Launcher.run(Launcher.java:81)
        at cpw.mods.modlauncher.Launcher.main(Launcher.java:65)

-- System Details --
Details:
        Minecraft Version: 1.15.2
        Minecraft Version ID: 1.15.2
        Operating System: Windows 10 (amd64) version 10.0
        Java Version: 1.8.0_131, Oracle Corporation
        Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
        Memory: 568328168 bytes (541 MB) / 1157627904 bytes (1104 MB) up to 2147483648 bytes (2048 MB)
        CPUs: 4
        JVM Flags: 11 total; -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=16M -XX:-UseAdaptiveSizePolicy -XX:-OmitStackTraceInFastThrow -Xmn128m -Xmx2048m -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump
        Launched Version: HMCL 3.3.166
        Backend library: LWJGL version 3.2.2 build 10
        Backend API: NO CONTEXT
        GL Caps:
        Using VBOs: Yes
        Is Modded: Definitely; Client brand changed to 'forge'
        Type: Client (map_client.txt)
        CPU: <unknown>
        OptiFine Version: OptiFine_1.15.2_HD_U_G1_pre13
        OptiFine Build: 20200401-232147
        Shaders: null
        OpenGlVersion: null
        OpenGlRenderer: null
        OpenGlVendor: null
        CpuCount: 0
[10:21:41] [Render thread/INFO] [STDOUT/]: [net.minecraft.util.registry.Bootstrap:func_179870_a:103]: #@!@# Game crashed! Crash report saved to: #@!@# C:\Users\17133\Desktop\李知航U盘\1.15.2_forge\.minecraft\crash-reports\crash-2020-04-22_10.21.41-client.txt

不要安装OptiFine 和Forge不兼容

你想装的话 来看看这个
https://www.mcbbs.net/thread-1004743-1-1.html

好吧，原来1.12.2可以，1.15.2就不行了，谢谢！