Testflight testers getting “unable to download app could not be installed at this time”

Question

I distributed version 1.0, build 1, of my app via TestFlight, and everything worked perfectly.

Yesterday I archived and sent out build 2, and now upon tapping the upd

Answer 1

I faced the same issue under the follow case: Created a Test users group in iTunes Connect even before the Build was approved (i.e. it was in "Waiting for Review" state). We did receive notifications from TestFlight, but when clicked on "View in TestFlight", received this error. I added the approved build to the Group and Resent the invites. This worked perfect for me.