iOS 10 public beta infinite loop
I had the same problem.. I really don't know how I fixed it because it was with iOS 9 public beta. I'm on iOS now, and here is the exact link for the beta profile. Also, just make sure you are enrolled in the program with apple or you won't be able to use feedback assistant.

https://drive.google.com/open?id=0B92o0HIZOVnQcWNZYXc1WktsNWM