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

Not sure if this is going to help,

Check Users and Roles > TestFlight Beta Testers

Do you have a tester who is testing the app that you want to transfer?