Below you can see that testing for external testers are turned off:
same for internal testing:
but when I transfer app, one of the criterias are not me
i had the same issue i deleted (mark expired) all the versions of app testing version in App TestFlight section and done the trick for me ;) attach is the screen shot of activity.
I have the exact same issue and I'm currently getting from Apple "our engineering team is still working diligently to have this resolved for you". I have been supplied with a workaround:
unfortunately, I still haven't been able to resolve the issue.
I've exactly the same problem and could not solve it. The good news: After contacting Apple, they have confirmed a bug and they're working on a solutions. Apple confirmed also, that many developers ran into this.
Got that workaround from the support (that did not work for me):
1. Enable TestFlight by adding a tester to a build
2. Then deactivate the build, by turning off TestFlight beta testing
3. Attempt to transfer again
I had the exact same issue, resolved by removing all Tester and Build from the TestFlight as discussed above also (!important) remove everything fields at the App Information - Test Information.
Do the same step as @Imran Iqbal answer, if your app is Sign-in Required, uncheck Sign-in Required also, like:
then, you can transfer app.
Creating new app version did it for me! Thanks!