Tekkit keeps crashing after a few minutes of play.

[NotSouthAfricant]

So I can play for a few minutes before the game just crashes. It happening every time. 

 

The crash report is saying this: 

---- Minecraft Crash Report ----
// Don't be sad, have a hug!

Time: 29/04/20 22:10
Description: Exception in server tick loop

java.lang.IllegalAccessError: tried to access method net.minecraft.server.management.PlayerManager.func_72690_a(IIZ)Lnet/minecraft/server/management/PlayerInstance; from class codechicken.chunkloader.ChunkLoaderManager
    at codechicken.chunkloader.ChunkLoaderManager.cleanChunks(ChunkLoaderManager.java:835)
    at codechicken.chunkloader.ChunkLoaderManager.tickEnd(ChunkLoaderManager.java:860)
    at codechicken.chunkloader.ChunkLoaderEventHandler.tickEnd(ChunkLoaderEventHandler.java:39)
    at cpw.mods.fml.common.SingleIntervalHandler.tickEnd(SingleIntervalHandler.java:34)
    at cpw.mods.fml.common.FMLCommonHandler.tickEnd(FMLCommonHandler.java:141)
    at cpw.mods.fml.common.FMLCommonHandler.onPostWorldTick(FMLCommonHandler.java:282)
    at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:677)
    at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:587)
    at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:175)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:484)
    at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:583)

 

 

So I'm assuming its to do with one f these mods 

codechickencore 0.9.0.7.jar

ChickenChunks 1.3.3.3.jar

However when I delete these from the modpack it just crashes at launch unlike when I have deleted other mods where it just asks if I want to play without the mod before starting the game. 

Please help. 

Edited April 29, 2020 by NotSouthAfricant

[Lord Ptolemy]

Not a discussion about Tekkit Classic, hell not even the Tekkit Classic modpack. Moved to Tekkit Main/Space bug reports.