Beta testing with internal testers for iOS 8

Question

I\'m having trouble with setting up a beta test with internal testers using iTunes Connect and TestFlight.

I\'ve added users as internal testers inside iTunes Connect,

Answer 1

As Fluffhead said, Gmail app won't work, since it opens Chrome for the link, which has no use.

Two options to accept the internal tester invitation in a mail from iTunes:
1) Use iOS Mail to click the link in the mail, then iOS Mail will open Safari automatically.
2) If iOS Mail is not available, copy the link and paste it to Safari. For example, you can use Gmail to click the link, copy the link in Chrome, and then paste it to Safari.