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

First, You must remove all build and user from TestFlight of that app. After its looks like below.

If you still not match last criteria than Sign Out and login again.