Description of the Bug

The world loads normally, but when i spawn the screen is black for a few seconds and then it takes me to the main menu with the text on the screenshot. I repaired and reinstalled the world but it didn't help.

I checked, the world is corrupted for some reason, i can start another world without a problem but the one i played with my friends is corrupted, is there a way to fix it?

Expected Behaviour

Played for almost 20 hours and then this started happening.

Modpack Version

1.12.2

Screenshots

Log

crash-2023-09-30_18.20.37-server

Extra Info

No response

The log you linked is not the log, just the filepath. To upload a log, please visit gist and drag your log into the window, create the gist, then share the link here.
Additionally, did you visit the discord before making an issue?

@yav12 I did check the discord but i didn't recieve any help or was allowed to type in any text channels. I updated the log, it should work now, if you know how to fix it, please tell me.

you'll probably want to hang around the MCE discord for future issues, be sure to read the rules thoroughly, as you can't really get access without doing so.

as for this issue, it appears the entities tag of a chunk was corrupted somehow, manually fixing that is more work than it's worth, since you don't even get to know what chunk in what region file.
loading a backup and using that is probably your simplest solution.

@anabsolutesloth Okay, thank you for your help, have a blessed life