I am using Forge 1.16.5-36.2.34 and am receiving this error every few seconds in my latest.log:

Does anyone know a fix for this?

[main/FATAL]: Error executing task on Client
java.lang.NullPointerException: null
	at net.minecraft.world.World.func_241211_a_(World.java:186) ~[?:?]
	at net.minecraft.world.World.func_180501_a(World.java:176) ~[?:?]
	at net.minecraft.client.network.play.ClientPlayNetHandler.func_243492_a(ClientPlayNetHandler.java:717) ~[?:?]
	at net.minecraft.client.network.play.ClientPlayNetHandler$$Lambda$23396/2028814998.accept(Unknown Source) ~[?:?]
	at net.minecraft.network.play.server.SMultiBlockChangePacket.func_244310_a(SourceFile:79) ~[?:?]
	at net.minecraft.client.network.play.ClientPlayNetHandler.func_147287_a(ClientPlayNetHandler.java:716) ~[?:?]
	at net.minecraft.network.play.server.SMultiBlockChangePacket.func_148833_a(SourceFile:71) ~[?:?]
	at net.minecraft.network.play.server.SMultiBlockChangePacket.func_148833_a(SourceFile:15) ~[?:?]
	at net.minecraft.network.PacketThreadUtil.func_225383_a(SourceFile:21) ~[?:?]
	at net.minecraft.network.PacketThreadUtil$$Lambda$22594/1426595770.run(Unknown Source) ~[?:?]
	at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213166_h(SourceFile:144) [?:?]
	at net.minecraft.util.concurrent.RecursiveEventLoop.func_213166_h(SourceFile:23) [?:?]
	at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213168_p(SourceFile:118) [?:?]
	at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213160_bf(SourceFile:103) [?:?]
	at net.minecraft.client.Minecraft.func_195542_b(Minecraft.java:948) [?:?]
	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:607) [?:?]
	at net.minecraft.client.main.Main.main(Main.java:184) [?:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_51]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_51]
	at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_51]
	at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:51) [forge-1.16.5-36.2.34.jar:36.2]
	at net.minecraftforge.fml.loading.FMLClientLaunchProvider$$Lambda$495/1277867318.call(Unknown Source) [forge-1.16.5-36.2.34.jar:36.2]
	at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.1.3.jar:?]
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.1.3.jar:?]
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.1.3.jar:?]
	at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.1.3.jar:?]
	at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.1.3.jar:?]

 

The version you are using is no longer supported on this forum.

Please update to a modern version of Minecraft to receive support.

Currently supported versions are 1.19.2 (Latest) and 1.18.2 (LTS).