How to correctly specify the application type?

Question

Classmates

Good afternoon!
Our application has a Web (HTML) version running in an iframe and a mobile version using oauth authentication. For the test application, I set the type Web (HTML) + External and everything worked fine.
But on the release version (which for some time worked only as Web), after prescribing the type External and redirect uri, an error is generated during authorization:
"For authorization, the application must have the EXTERNAL type."
With what it can be connected?

Answer 1

We figured it out on our own - the problem was with our settings