TV App Login not working

Has anyone been able to resolve their inability to sign into TV apps using their U-verse login?

I'm getting the "You are not subscribed to this channel" message for app logins. This seems to be an ongoing issue for most customers back to 2015. I've gotten nothing but "we know this is an issue and will be resolved within a few hours" from the AT&T agents. I never had this problem with DirecTV Now. If this is the way U-Verse does business, I'll cancel and go back to DTVN even though it's less channels.