Server completely broke after i switched from paper 1.21.4 to purpur 1.21.8

[19:12:14 ERROR]: [Multiverse-Core] The world 'world_minecraft_plains' could NOT be loaded because it contains errors and is probably corrupt!
[19:12:14 ERROR]: [Multiverse-Core] Try using Minecraft Region Fixer to repair your world! 'world_minecraft_plains'
[19:12:14 ERROR]: [Multiverse-Core] https://github.com/Fenixin/Minecraft-Region-Fixer

its giving you the solution

get region fixer, take ur world, and repair it

getting told that paper has little to no optimizations

what

all purpur optimizations are literally FROM paper

purpur's scope is not optimization, but configuration

but yeah, about the issue, it's likely something to do with version update itself and not paper -> purpur migration

are all my worlds corrupted nkw

now

do you have a backup?

try removing multiverse for a moment

see if regular worlds load

no..

the world data is iver 100gb on its own

over

Do what @Philippine Crocodile has said, if it doesnt work. try what the error is telling you to do. If that doesnt work, then its most likely broken

Always have backups when upgrading, make sure you have this moment as a lesson learned 😓

Very true

i wasnt gonna download a 200gb backup

the worlds on its own are 112gb

The place you use doesnt have their own backup system to use?

well, you're about to suffer consequences of that decision then