Log Error Report: [19:20:56] [main/ERROR] [LaunchWrapper]: Unable to launch 683 [URL:https://aternos.org/log/#L683] java.lang.reflect.InvocationTargetException: null 684 [URL:https://aternos.org/log/#L684] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_252] 685 [URL:https://aternos.org/log/#L685] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_252] 686 [URL:https://aternos.org/log/#L686] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_252] 687 [URL:https://aternos.org/log/#L687] at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_252] 688 [URL:https://aternos.org/log/#L688] at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?] 689 [URL:https://aternos.org/log/#L689] at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?] 690 [URL:https://aternos.org/log/#L690] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_252] 691 [URL:https://aternos.org/log/#L691] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_252] 692 [URL:https://aternos.org/log/#L692] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_252] 693 [URL:https://aternos.org/log/#L693] at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_252] 694 [URL:https://aternos.org/log/#L694] at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.run(ServerLaunchWrapper.java:70) [forge.jar:?] 695 [URL:https://aternos.org/log/#L695] at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper.java:34) [forge.jar:?] 696 [URL:https://aternos.org/log/#L696] Caused by: java.lang.VerifyError: Bad return type 697 [URL:https://aternos.org/log/#L697] Exception Details: 698 [URL:https://aternos.org/log/#L698] Location: 699 [URL:https://aternos.org/log/#L699] net/minecraft/entity/player/EntityPlayerMP.func_175398_C()Lnet/minecraft/entity/Entity; @15: areturn 700 [URL:https://aternos.org/log/#L700] Reason: 701 [URL:https://aternos.org/log/#L701] Type 'java/lang/Object' (current frame, stack[0]) is not assignable to 'net/minecraft/entity/Entity' (from method signature) 702 [URL:https://aternos.org/log/#L702] Current Frame: 703 [URL:https://aternos.org/log/#L703] bci: @15 704 [URL:https://aternos.org/log/#L704] flags: { } 705 [URL:https://aternos.org/log/#L705] locals: { 'net/minecraft/entity/player/EntityPlayerMP' } 706 [URL:https://aternos.org/log/#L706] stack: { 'java/lang/Object' } 707 [URL:https://aternos.org/log/#L707] Bytecode: 708 [URL:https://aternos.org/log/#L708] 0x0000000: 2ab4 0829 c700 072a a700 072a b408 29b0 709 [URL:https://aternos.org/log/#L709] 0x0000010: 710 [URL:https://aternos.org/log/#L710] Stackmap Table: 711 [URL:https://aternos.org/log/#L711] same_frame(@11) 712 [URL:https://aternos.org/log/#L712] same_locals_1_stack_item_frame(@15,Object[#1348]) 713 [URL:https://aternos.org/log/#L713] 714 [URL:https://aternos.org/log/#L714] at net.minecraft.util.datafix.DataFixesManager.func_188279_a(DataFixesManager.java:170) ~[rz.class:?] 715 [URL:https://aternos.org/log/#L715] at net.minecraft.server.MinecraftServer.main(MinecraftServer.java:1542) ~[MinecraftServer.class:?] 716 [URL:https://aternos.org/log/#L716] ... 12 more Can someone please help??