Check your Notifications section. Possibly people have sent you invitations unasked for, and the system considers those as a type of application.
You’ll need to file a support ticket to get someone to help you with this. If you make no headway there, then it might help to ask for a mod’s attention to ensure it’s in the right place and being processed.
But be sure to submit a help request, not a bug. Bug and feedback reports never get a response, as the confirmation window states.