Server crashing, Fabric API issue.

Server keeps crashing after saving on startup.

I keep getting this message every time.

I'm horrid at reading logs but it's seemingly something to do with fabrics API.

I've tried to switch versions around, even getting rid of it and re-adding ive also messed around with mods and everything else I can think of.

I have the exact same set up and it works just fine in a singleplayer world, just for some reason it doesn't want to translate to server.

I normally don't ask about these things unless I'm really stumped. After all the forum is filled with these kinds of reports. However none of them quite match the issue im having. Is there a bug I'm not aware of? Something I over looked that I was too blind to see? I can provide more information if needed. Mods, versions, etc.

A little help would be appreciated. I am lost.

Quote from Roman

Share the full log using the share button on the log page

That quite literally is the full log

https://mclo.gs/X3UmQPC

Quote from Julian

One of your mods probably doesn't work on servers.

You'll have to try them put seperately to find out which

Did some digging, got rid of fall flying lib and it started properly. Best part is it's not even important! I got lucky.