After "Reset All Settings" on an iPhone 5 with iOS 8.3, I can't install betas via TestFlight.
@azimov the problem is coming from OS 8.3, we all have the same issue only with devices on OS 8.3. I personally tried to re-invite, change the apple account, even reset my phone...
I have this issue as well. On the same hardware, iOS 9 users are fine, 8.3 users cannot install.
I did not have this issue on Feb 1.
来源：https://stackoverflow.com/questions/35397965/cant-install-apps-from-test-flight-there-was-an-error-with-this-request