It sounds like whatever they are uploading is not the right files. Do they do that deal where you put a mod id somewhere and they take care of everything else? If you can, have you tried deleting my mod's folder entirely, then adding it back?

i alreay fixed the problem but thank you

i did a backup delet the whole mod and startet the server.the i installed it again.
and load the backup

Thank you for letting people know the steps you took!

I did this too.. didn't help