Same problem here. I can test with internal users within my Apple Connect account, but if I invite external people to test the app, they get the samem message.

I'm having the same issue. I want to test the app on a prior version but can't download the TestFlight if iOS is lower than 13.

Hey guys, It was happening the same to me. I followed the suggestions of the people here and removed the extension I had on the app (as my app is new, it was ok for me to remove the other target for now). I have published it again over XCode and it worked fine! Interestingly, I have a deployment set with CodeMagic that was throwing the following error: Error (Xcode): No profiles for 'myapp.ImageNotification' were found: Xcode couldn't find any iOS App Development provisioning profiles matching 'myapp.ImageNotification'. Automatic signing is disabled and unable to generate a profile. To enable automatic signing, pass -allowProvisioningUpdates to xcodebuild. It appears that there was a problem signing your application prior to installation on the device. Verify that the Bundle Identifier in your project is your signing id in Xcode open ios/Runner.xcworkspace Also try selecting 'Product > Build' to fix the problem: Encountered error while archiving for device. Build failed :| Failed to build for iOS The XCode didn't throw any error to publish the app, but CodeMagic has blocked the build because of this error. I gave up on the pipeline and am doing it manually for now.