When I Archive and upload to app store connect to test in TestFlight. It cannot download app and show
Could not install [App] The requested app is not available or doesn't exist.
and When I look at previous Builds. It show same message in all build version.
It happen after renew apple development programs.
In my case, my app has been removed from Appstore a few years ago. When I upgraded the code and tried to send it to Testflight, this happened. THE SOLUTION IS, make necessary changes in the app and release it into the Appstore again. when your app is successfully Launched, Your Testflight will be automatically restored. When the app is removed from the store and is still "Not in sale", this happens. Release the app and everything will be fine. If this does not work, contact apple support.