Error 400 bad request - environment

Hey there,
we have an extension app with oktaSignIn widget integration.

Well, login process goes pretty nice, but we have an issue with the redirect process after the login action.

In Okta admin panel I filled Login redirect URIs with extension page, looks like chrome-extension://hkkpbdhmflknabldaplonfpefmaejibb/okta.html
and okta doesn’t give an error like The ‘redirect_uri’ parameter must be an absolute URI that is whitelisted in the client app settings, I think because it has redirect_uri

I receive this message: - “The requested feature is not enabled in this environment”.

Does anybody know, what feature is not enabled in my environment, or in what cases this error appears in the flow?

Thanks for help