world crashes when loading in forge

[zombiedarwin]

Hello,

A single world i've working on over lockdown has stopped loading, other worlds still work. It crashes just before it should start saying 'joining world'. I've tried loading the world on my partners computer and the same issue arises

We made a backup of the world and tried running it in vanilla to check if the work was lost, but it works fine.

We don't have a backup of before the issue started.

my computer is old so we weren't sure if it was an issue with that, I've reinstalled forge and minecraft to try and fix it. I also tried a factory reset just incase, but none of this has fixed the problem.

Here's a pastebin of the game output

https://pastebin.com/zyiuAan8

Any help would be greatly appreciated :) 

 

[DaemonUmbra]

Please provide debug.log (more info on where it is and how to provide it in my signature below, just expand the spoiler)

[zombiedarwin]

Here's the pastebin,

https://pastebin.com/xVn5PYEh

Thankyou