any time i load a plugin IF the server is running i get a error example below I've tried a whole bunch of different plugins all of them do the same thing now if I restart the server they work. so what going on

running the latest of everything.

[DEBUG] Load requested for plugin which is already loading: AdvancedArrows

AdvancedArrows was compiled successfully in 1672ms

Unable to find main plugin class: AdvancedArrows

No previous version to rollback plugin: AdvancedArrows​

That generally means the file was not readable. I’d suggest uploading it to your server again and make sure the encoding has not changed.