iTunesConnect: cannot transfer app because of “You must turn off TestFlight beta testing for the app that you want to transfer”

Question

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

Answer 1

I just solved the transfer issue, you just need to expire your build from tester by following the steps below. and then app will available for transfer..

open your app and click on testflight then click on the icon of your app as shown in below screenshot.

The click on expire build.

Now you can transfer your app :)