When I add a user into AppStoreConnect->UsersAndAccess - the user gets an AppStoreConnect invitation email. However, when I add this uer to a Internal testing group on TestFlight tab - no invitation email is being sent. "Resent email" button is also not doing anything. I've tried removing/readding the user, tried to remove/recreate the test group, tried to re-upload the build - still no emails from testflight. Tried with different users and different emails. No luck at all :( Anything else I could try to get this email sent? Or at least to get any error messages on why there is no email?