Since upgrading to iOS 6 I have been unable to install the "TestFlight Access" profile, and my clients running 6.0 are experiencing the same issues. I have googled the issue but I am not finding any results.
The error message is just after you enter your device password and reads:
"Profile Installation Failed A network error has occurred"
I have verified I have a good network connection, and the error is happening at multiple physical locations (different service providers and internet access)
Thanks in advance!
I just had the same problem with our build and one of our testers found this solution:
" advise people to go to settings > general > profiles and remove their profile and then clear cookies / cache, reboot the phone and it should work"
Make sure to remove the TestFlight WebClip profile as well.
Hope this helps!
Ryan