hey there i got a crash wehn your mod is installed on a server wasnt there a way to flag mods client only so it could be installed but would be ignored on start up?

What mod loader was this on? And do you mind posting your crash log?

crash-2024-02-16_20.35.09-fml.txt server forge version 47.2.0

Still a problem, different error
crashlog.txt

this mod aint ment for a server