I'm having the same problem, one day i was just trying to play on my modded 1.20 world and it gave me the same error screen. I didn't do anything before, though. it didn't crash or restart on me. maybe something bugged, because i streamed me playing before i got this error screen but the video didn't save (I have vods on) so I'm not sure what happened.
what am i meant to upload exactly for help? I don't have a backup save to my knowledge.
this was a day it was working, i had to remove 30% of the error codes, idk what this stuff means
https://pastebin.com/McQJUQvM