My world keeps crashing when changing dimensions on all modpacks, this wasn't an issue when I first got my computer about two years ago, although its getting pretty annoying now that I have to keep going through dimensions to progress and crashing each time I go to from one dimension to another. Let me know if theres any fixes or if anyone needs any logs of a kind.

would this suffice? everything that happened in my ATlauncher log from before I went into the nether

[27/10/2020 13:51:34 PM] [Client thread/INFO]: GenSettings: 
[27/10/2020 13:51:34 PM] [Client thread/INFO]: Preset: Sky Factory 4
[27/10/2020 13:51:38 PM] [Client thread/INFO]: Mapping halted in **USERSDIR**\instances\b\journeymap\data\mp\Minecraft~Server\DIM0
[27/10/2020 13:57:41 PM] [Client thread/INFO]: Unloaded world <net.minecraft.client.multiplayer.WorldClient@5c79d143 0 MultiplayerChunkCache: 441, 441> is still hanging around after 120 seconds.
[27/10/2020 13:57:42 PM] [13:57:42] [Netty Client IO #4/ERROR]: NetworkDispatcher exception
[27/10/2020 13:57:42 PM] java.io.IOException: An existing connection was forcibly closed by the remote host
[27/10/2020 13:57:42 PM]     at sun.nio.ch.SocketDispatcher.read0(Native Method) ~[?:1.8.0_271]
[27/10/2020 13:57:42 PM]     at sun.nio.ch.SocketDispatcher.read(Unknown Source) ~[?:1.8.0_271]
[27/10/2020 13:57:42 PM]     at sun.nio.ch.IOUtil.readIntoNativeBuffer(Unknown Source) ~[?:1.8.0_271]
[27/10/2020 13:57:42 PM]     at sun.nio.ch.IOUtil.read(Unknown Source) ~[?:1.8.0_271]
[27/10/2020 13:57:42 PM]     at sun.nio.ch.SocketChannelImpl.read(Unknown Source) ~[?:1.8.0_271]
[27/10/2020 13:57:42 PM]     at io.netty.buffer.PooledUnsafeDirectByteBuf.setBytes(PooledUnsafeDirectByteBuf.java:288) ~[netty-all-4.1.9.Final.jar:4.1.9.Final]
[27/10/2020 13:57:42 PM]     at io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:1100) ~[netty-all-4.1.9.Final.jar:4.1.9.Final]
[27/10/2020 13:57:43 PM]     at io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:372) ~[netty-all-4.1.9.Final.jar:4.1.9.Final]
[27/10/2020 13:57:43 PM]     at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:123) [netty-all-4.1.9.Final.jar:4.1.9.Final]
[27/10/2020 13:57:43 PM]     at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:624) [netty-all-4.1.9.Final.jar:4.1.9.Final]
[27/10/2020 13:57:43 PM]     at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:559) [netty-all-4.1.9.Final.jar:4.1.9.Final]
[27/10/2020 13:57:43 PM]     at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:476) [netty-all-4.1.9.Final.jar:4.1.9.Final]
[27/10/2020 13:57:43 PM]     at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:438) [netty-all-4.1.9.Final.jar:4.1.9.Final]
[27/10/2020 13:57:43 PM]     at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858) [netty-all-4.1.9.Final.jar:4.1.9.Final]
[27/10/2020 13:57:43 PM]     at java.lang.Thread.run(Unknown Source) [?:1.8.0_271]
[27/10/2020 13:57:43 PM] [13:57:42] [Netty Client IO #4/INFO]: Reset configs to client values for com.enderio.core.common.config.ConfigHandler
[27/10/2020 13:57:43 PM] [13:57:42] [Netty Client IO #4/INFO]: Cleaning client cache...
[27/10/2020 13:57:43 PM] [13:57:42] [Netty Client IO #4/INFO]: Cleared cached client data! Disconnected from server.
[27/10/2020 13:57:59 PM] [Client thread/INFO]: JEI search tree manager injection complete!
[27/10/2020 13:57:59 PM] [Client thread/INFO]: Applying holder lookups
[27/10/2020 13:58:00 PM] [Client thread/INFO]: Holder lookups applied
[27/10/2020 13:58:03 PM] [Client thread/INFO]: Finished loading Cardboard Box blacklist (loaded 1 entries)
[27/10/2020 13:58:06 PM] [13:58:06] [Session-Validator/INFO]: Session validation successful
 

37 minutes ago, diesieben07 said:

Post the debug.log.

the whole file is here

latest.log