PHP Fatal error: Class 'LeagueManager' not found in us-football.php on line 10

Can you deactivate and then reactivate the plugin and see if that helps?

Already did that and still happening :S

After deleting it and uploading again it’s working properly! Thanks

Good to hear, I’ve seen it once before and reactivating worked, so you had me stumped… Thanks

Are the tables will be deleted when you uninstall and reinstall the plug?

No tables are deleted