Unable to log in to U-verse app

Hello! I’ve been through the forum and tried a lot of things, but am still unable to log in to my U-verse app. I can log in to att.com with both my Member ID and Access ID, and I even created a new sub-account (which has worked for a number of other users), but I’m still unable to log in. Anything else I should be trying? “Connection issue. Please log in again. Error code:998” November 15, 2022