下面是启动器的报错日志
---- Hello Minecraft! Crash Report ----
  Version: 3.3.181
  Time: 2021-02-01 15:40:53
  Thread: Thread[JavaFX Application Thread,5,main]

  Content:
    java.lang.NullPointerException
        at org.jackhuang.hmcl.setting.Accounts.lambda$init$5(Accounts.java:200)
        at java.lang.Iterable.forEach(Unknown Source)
        at org.jackhuang.hmcl.setting.Accounts.init(Accounts.java:199)
        at org.jackhuang.hmcl.setting.Settings.<init>(Settings.java:54)
        at org.jackhuang.hmcl.setting.Settings.init(Settings.java:45)
        at org.jackhuang.hmcl.setting.ConfigHolder.init(ConfigHolder.java:71)
        at org.jackhuang.hmcl.Launcher.start(Launcher.java:58)
        at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$8(LauncherImpl.java:863)
        at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$7(PlatformImpl.java:326)
        at com.sun.javafx.application.PlatformImpl.lambda$null$5(PlatformImpl.java:295)
        at java.security.AccessController.doPrivileged(Native Method)
        at com.sun.javafx.application.PlatformImpl.lambda$runLater$6(PlatformImpl.java:294)
        at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
        at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
        at com.sun.glass.ui.win.WinApplication.lambda$null$4(WinApplication.java:185)
        at java.lang.Thread.run(Unknown Source)


-- System Details --
  Operating System: Windows 10 10.0
  Java Version: 1.8.0_281, Oracle Corporation
  Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
  JVM Max Memory: 5693243392
  JVM Total Memory: 384303104
  JVM Free Memory: 315748200

应该不是启动器问题吧，你先把mods的文件全放到其他地方试一下，大部分启动不了都是mod问题

删除hmcl.json

他是启动器崩溃，不是游戏打不开

重装启动器试试，检查下java版本是不是有问题
HMCL启动器|Hello Minecraft! Launcher 3.2 —— Win/Mac苹果系统/Ubuntu|2亿次使用
https://www.mcbbs.net/thread-142335-1-1.html
(出处: Minecraft(我的世界)中文论坛)