I am a beta tester. I successfully tested an app this week. However, a different app, by a different developer is generating the “TestFlight is unavailable. Try again” error. I have force closed, and then deleted the TF app, and restarted A16 iPad running 26.3.1 iPadOS, then redownloaded to no effect. I have worked with an Apple Senior Support advisor, and found no network, Apple ID problems on my end after troubleshooting for nearly 2 hours. The developer tried emailing me the link - didn’t work. Now, update builds by developer are now showing the same error on other beta testers iPads, - however, one tester can download the app for beta testing on an iPad Pro M4. The app will download to my phone as well as others´ phones, running current update, but not my iPad. I changed my Apple ID password, reset my network, and nothing works.