crash

---- Minecraft Crash Report ----
// You should try our sister game, Minceraft!

Time: 5/25/19 9:21 PM
Description: Exception in server tick loop

org.spongepowered.asm.mixin.transformer.throwables.MixinTransformerError: An unexpected critical error was encountered
	at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:521)
	at net.fabricmc.loader.launch.knot.KnotClassDelegate.loadClassData(KnotClassDelegate.java:163)
	at net.fabricmc.loader.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:142)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	at net.minecraft.class_3218.<init>(class_3218.java:167)
	at net.minecraft.server.MinecraftServer.method_3786(MinecraftServer.java:380)
	at net.minecraft.server.MinecraftServer.method_3735(MinecraftServer.java:370)
	at net.minecraft.class_3176.method_3823(class_3176.java:218)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:605)
	at java.lang.Thread.run(Thread.java:748)
Caused by: org.spongepowered.asm.mixin.injection.throwables.InjectionError: Critical injection failure: Variable modifier method localvar$calcPos$zzg000(Lnet/minecraft/class_2338;)Lnet/minecraft/class_2338; in portallookup.mixins.json:PortalForcerMixin failed injection check, (0/1) succeeded. Using refmap ExtraTicks-refmap.json
	at org.spongepowered.asm.mixin.injection.struct.InjectionInfo.postInject(InjectionInfo.java:290)
	at org.spongepowered.asm.mixin.transformer.MixinTargetContext.applyInjections(MixinTargetContext.java:1203)
	at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.applyInjections(MixinApplicatorStandard.java:939)
	at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.applyMixin(MixinApplicatorStandard.java:323)
	at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.apply(MixinApplicatorStandard.java:281)
	at org.spongepowered.asm.mixin.transformer.TargetClassContext.applyMixins(TargetClassContext.java:353)
	at org.spongepowered.asm.mixin.transformer.MixinTransformer.apply(MixinTransformer.java:724)
	at org.spongepowered.asm.mixin.transformer.MixinTransformer.applyMixins(MixinTransformer.java:703)
	at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:509)
	... 9 more