Hi,
I am trying to invite a developer in my internal tester group to my app on Testflight. When they receive the invite email and enter the invite code on Testflight, the invitation code is expired. The email send time and entering the code is done within 10 minutes so I don't understand why it doesn't work.
It happens when I re-invite, remove and add the tester account as well as fully remove them from App Store Connect and add them again. Happening on Testflight App on Mac and iPhone.
Any way we can fix this? We've been having this issue for the past few weeks.