不管是单人游戏还是多人游戏都报错java空指针：group崩溃报告如下
---- Minecraft Crash Report ----
// There are four lights!

Time: 19-5-29 涓婂崍2:21
Description: FML has discovered extracted jar files in the mods directory.
This breaks mod loading functionality completely.
Remove the directories and replace with the jar files originally provided.

java.lang.RuntimeException: Extracted mod jars found, loading will NOT continue
        at net.minecraftforge.fml.relauncher.CoreModManager.findDerpMods(CoreModManager.java:291)
        at net.minecraftforge.fml.relauncher.CoreModManager.discoverCoreMods(CoreModManager.java:331)
        at net.minecraftforge.fml.relauncher.CoreModManager.handleLaunch(CoreModManager.java:264)
        at net.minecraftforge.fml.relauncher.FMLLaunchHandler.setupHome(FMLLaunchHandler.java:105)
        at net.minecraftforge.fml.relauncher.FMLLaunchHandler.setupClient(FMLLaunchHandler.java:79)
        at net.minecraftforge.fml.relauncher.FMLLaunchHandler.configureForClientLaunch(FMLLaunchHandler.java:42)
        at net.minecraftforge.fml.common.launcher.FMLTweaker.injectIntoClassLoader(FMLTweaker.java:139)
        at net.minecraft.launchwrapper.Launch.launch(Launch.java:115)
        at net.minecraft.launchwrapper.Launch.main(Launch.java:28)


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

-- System Details --
Details:
        Minecraft Version: 1.12.2
        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: 79886080 bytes (76 MB) / 164626432 bytes (157 MB) up to 2641887232 bytes (2519 MB)
        LiteLoader Brand: LiteLoader startup incomplete
        LiteLoader Mods: LiteLoader startup incomplete
        LaunchWrapper: 5 active transformer(s)
          - Transformer: org.spongepowered.asm.mixin.transformer.Proxy
          - Transformer: com.mumfrey.liteloader.transformers.event.EventProxyTransformer
          - Transformer: com.mumfrey.liteloader.launch.LiteLoaderTransformer
          - Transformer: com.mumfrey.liteloader.client.transformers.CrashReportTransformer
          - Transformer: net.minecraftforge.fml.common.asm.transformers.PatchingTransformer
        JVM Flags: 2 total; -Xmx2834m -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump
        IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0

尝试暂时删除 mods 文件夹

崩溃与错误搭不上号。。。。
你重新进一下应该就好了
崩溃是说存在已解压的mod

意思是jar文件被解压之后放在mod文件夹里了？我mod文件夹里并没有解压过的文件夹啊

暂时删除无效，一样报错

再次上传崩溃崩溃报告

本帖最后由 a1294790523 于 2019-6-21 14:43 编辑

崩溃与错误搭不上号。。。。
我只是顺便解释了而已
你上传一下日志吧
位于.minecraft\logs\latest.log

[19:50:20] [Client thread/INFO]: Setting user: Tombaba
[19:50:20] [Client thread/INFO]: LWJGL Version: 2.9.4
[19:50:21] [Client thread/INFO]: Reloading ResourceManager: Default
[19:50:24] [Sound Library Loader/INFO]: Starting up SoundSystem...
[19:50:24] [Thread-3/INFO]: Initializing LWJGL OpenAL
[19:50:24] [Thread-3/INFO]: (The LWJGL binding of OpenAL.  For more information, see http://www.lwjgl.org)
[19:50:24] [Thread-3/INFO]: OpenAL initialized.
[19:50:24] [Sound Library Loader/INFO]: Sound engine started
[19:50:27] [Client thread/INFO]: Created: 1024x512 textures-atlas
[19:50:29] [Client thread/INFO]: Narrator library for x64 successfully loaded
[19:50:47] [Client thread/INFO]: Connecting to dxg3.chaowan.me, 30528
[19:50:47] [Server Connector #1/ERROR]: Couldn't connect to server
java.lang.NullPointerException: group
        at io.netty.bootstrap.AbstractBootstrap.group(AbstractBootstrap.java:84) ~[netty-all-4.1.9.Final.jar:?]
        at gw.a(SourceFile:276) ~[1.12.2.jar:?]
        at bkr$1.run(SourceFile:58) [1.12.2.jar:?]
[19:54:27] [Client thread/INFO]: Stopping!
[19:54:27] [Client thread/INFO]: SoundSystem shutting down...
[19:54:27] [Client thread/WARN]: Author: Paul Lamb, www.paulscode.com

你有没有安装FTBU客户端实用工具，建议前往curseforge发布页更新试试

部分版本建立玩家组队会崩掉游戏

重新进一下就行了
估计是已经在bugsmojang的bug了