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

Same error for me. The only thing that worked for me was to uninstall the TestFlight app and then reinstalling.