Sorry for the inconvenience.... but this may get you back and situated with Testflight on your device
- Remove TestFlight Webclip from window
- Go To Settings > General > Profiles
- Remove the TestFlight WebClip
- Go to Settings > Safari
- Make Sure Private Browsing is Turned Off
- Clear Cookies and Data
- Open up Safari
- go to https://testflightapp.com/m/login and run through the steps