Java.lang.NoSuchMethodError: net.minecraft.util.ResourceLocation.compareNamespaced(Lnet/minecraft/util/ResourceLocation;)I
at net.minecraftforge.registries.ForgeRegistry$Snapshot.lambda$static$0(ForgeRegistry.java:844) ~[forge:?] {re: classloading}
at java.util.TreeMap.compare(Unknown Source) ~[?:1.8.0_261] {}
at java.util.TreeMap.put(Unknown Source) ~[?:1.8.0_261] {}
at net.minecraftforge.registries.ForgeRegistry.lambda$makeSnapshot$3(ForgeRegistry.java:820) ~[forge:?] {re: classloading}
at com.google.common.collect.HashBiMap.forEach(HashBiMap.java:528) ~[guava-21.0.jar:?] {}
at net.minecraftforge.registries.ForgeRegistry.makeSnapshot(ForgeRegistry.java:820) ~[forge:?] {re: classloading}
at net.minecraftforge.registries.RegistryManager.lambda$takeSnapshot$2(RegistryManager.java:180) ~[forge:?] {re: classloading}
at java.lang.Iterable.forEach(Unknown Source) ~[?:1.8.0_261] {}
at net.minecraftforge.registries.RegistryManager.takeSnapshot(RegistryManager.java:180) ~[forge:?] {re: classloading}
at net.minecraftforge.fml.FMLWorldPersistenceHook.getDataForWriting(FMLWorldPersistenceHook.java:76) ~[forge:?] {re: classloading}
at net.minecraftforge.fml.WorldPersistenceHooks.lambda$handleWorldDataSave$0(WorldPersistenceHooks.java:40) ~[forge:?] {re: classloading}
at java.util.ArrayList.forEach(Unknown Source) ~[?:1.8.0_261] {}
at net.minecraftforge.fml.WorldPersistenceHooks.handleWorldDataSave(WorldPersistenceHooks.java:40) ~[forge:?] {re: classloading}
at net.minecraft.world.storage.SaveFormat$LevelSave.func_237288_a_(SaveFormat.java:345) ~[?:?] {re: computing_frames, re: classloading}
at net.minecraft.world.storage.SaveFormat$LevelSave.func_237287_a_(SaveFormat.java:336) ~[?:?] {re: computing_frames, re: classloading}
at net.minecraft.client.Minecraft.func_238195_a_(Minecraft.java:1735) ~[?:?] {re: classloading, pl: accesstransformer. Pl: runtimedistcleaner: A}
at net.minecraft.client.Minecraft.lambda$loadWorld$29(Minecraft.java:1799) ~[?:?] {re: classloading, pl: accesstransformer. Pl: runtimedistcleaner: A}
at net.minecraft.client.Minecraft.lambda$deleteWorld$31(Minecraft.java:1834) ~[?:?] {re: classloading, pl: accesstransformer. Pl: runtimedistcleaner: A}
at net.minecraft.client.gui.screen.ConfirmScreen.func_213002_b(SourceFile:41) ~[?:?] {re: classloading}
at net.minecraft.client.gui.widget.button.Button.func_230930_b_(SourceFile:33) ~[?:?] {re: classloading}at net.minecraft.client.gui.widget.button.AbstractButton.func_230982_a_(SourceFile:16) ~[?:?] {re: classloading}at net.minecraft.client.gui.widget.Widget.func_231044_a_(Widget.java:136) ~[?:?] {re: classloading, pl: runtimedistcleaner: A}
at net.minecraft.client.gui.INestedGuiEventHandler.func_231044_a_(SourceFile:27) ~[?:?] {re: classloading}
at net.minecraft.client.MouseHelper.lambda$mouseButtonCallback$0(MouseHelper.java:87) ~[?:?] {re: classloading, pl: runtimedistcleaner: A}
at net.minecraft.client.gui.screen.Screen.func_231153_a_(Screen.java:427) ~[?:?] {re: classloading, pl: runtimedistcleaner: A}
at net.minecraft.client.MouseHelper.func_198023_a(MouseHelper.java:85) ~[?:?] {re: classloading, pl: runtimedistcleaner: A}
at net.minecraft.client.MouseHelper.lambda$null$4(MouseHelper.java:175) ~[?:?] {re: classloading, pl: runtimedistcleaner: A}
at net.minecraft.util.concurrent.ThreadTaskExecutor.execute(ThreadTaskExecutor.java:104) ~[?:?] {re: classloading, pl: accesstransformer. Xf: OptiFine: default}
at net.minecraft.client.MouseHelper.lambda$registerCallbacks$5(MouseHelper.java:174) ~[?:?] {re: classloading, pl: runtimedistcleaner: A}
at org.lwjgl.glfw.GLFWMouseButtonCallbackI.callback(GLFWMouseButtonCallbackI.java:36) ~[lwjgl-glfw-3.2.2.jar: build 10] {}
WorldPersistenceHooks или mousehelpers мешает насколько я понял. Попробуй убрать по одному и потестировать
