błąd

Caused by: java.lang.VerifyError: Inconsistent stackmap frames at branch target 13
Exception Details:
  Location:
    Config.getWorldServer()Lnet/minecraft/world/BossInfoServer; @13: getstatic
  Reason:
    Type 'net/minecraft/client/network/NetHandlerPlayClient' (current frame, locals[0]) is not assignable to 'net/minecraft/world/GameType' (stack map, locals[0])
  Current Frame:
    bci: @8
    flags: { }
    locals: { 'net/minecraft/client/network/NetHandlerPlayClient' }
    stack: { 'net/minecraft/client/network/NetHandlerPlayClient' }
  Stackmap Frame:
    bci: @13
    flags: { }
    locals: { 'net/minecraft/world/GameType' }
    stack: { }
  Bytecode:
    0x0000000: b202 d3b4 056c 4b2a c700 0501 b0b2 02d3
    0x0000010: b605 709a 0005 01b0 b202 d3b6 0573 4c2b
    0x0000020: c700 0501 b02a b405 784d 2cc7 0005 01b0
    0x0000030: 2cb6 057e 4e2b 2db6 0582 b605 853a 0419
    0x0000040: 04b0 3a04 01b0
  Exception Handler Table:
    bci [53, 65] => handler: 66
  Stackmap Table:
    append_frame(@13,Object[#1390])
    same_frame(@24)
    append_frame(@37,Object[#1397])
    append_frame(@48,Object[#1402])
    full_frame(@66,{Object[#1390],Object[#1397],Object[#1402],Object[#1408]},{Object[#1384]})

	at Reflector.logEntry(Reflector.java:1207) ~[Reflector.class:?]
	at Reflector.<clinit>(Reflector.java:109) ~[Reflector.class:?]
	at net.minecraft.crash.CrashReport.func_71504_g(CrashReport.java:138) ~[b.class:?]
	at net.minecraft.crash.CrashReport.<init>(CrashReport.java:54) ~[b.class:?]
	at net.minecraft.crash.CrashReport.func_85055_a(CrashReport.java:425) ~[b.class:?]
	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:382) ~[bib.class:?]
	at net.minecraft.client.main.Main.main(SourceFile:123) ~[Main.class:?]
	... 6 more
Exception in thread "Client thread" [20:11:31] [Client thread/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:-1]: net.minecraftforge.fml.relauncher.FMLSecurityManager$ExitTrappedException
[20:11:31] [Client thread/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:-1]: 	at net.minecraftforge.fml.relauncher.FMLSecurityManager.checkPermission(FMLSecurityManager.java:49)
[20:11:31] [Client thread/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:-1]: 	at java.lang.SecurityManager.checkExit(Unknown Source)
[20:11:31] [Client thread/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:-1]: 	at java.lang.Runtime.exit(Unknown Source)
[20:11:31] [Client thread/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:-1]: 	at java.lang.System.exit(Unknown Source)
[20:11:31] [Client thread/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:-1]: 	at net.minecraft.launchwrapper.Launch.launch(Launch.java:138)
[20:11:31] [Client thread/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:-1]: 	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Java HotSpot(TM) Client VM warning: Using incremental CMS is deprecated and will likely be removed in a future release