I was able to resolve the issue.
The problem is for those that are migrating from another att video service, e.g. DIRECTV satellite and that account was linked to myATT. If you used the same email as the myATT login or the same email as your previous video service, the Roku app will not work even though other apps (iPhone or Apple TV) work just fine.
the solution is to open a new DIRECTV Stream account with an unrelated email and DO NOT LINK this account to myATT. Note when ordering a new DIRECTV Stream service there is an option to use a previous ATT email - DO NOT USE. Set up DIRECTV Stream as if you have ZERO relationships with ATT.
I then had to call ATT and cancel the previous account (i.e. the one that was linked to myATT and that used the same email as DIRECTV satellite) that wasn’t working on the Roku device
This is what I did and it worked for me.
I did all of above — was a DIRECTV satellite customer, switched to DTV Stream, set up a Stream account with a different email address (given my DIRECTV.com and ATT accounts were/are linked). After multiple subscriptions, testing, and cancellations and restarts, finally was about to access the Stream app on iPhone and 1 fire stick TV, but have not been able to access Stream on another fire stick TV or a ROKU TV. Each throws a care code 902 upon login attempt with new Stream credentials. So doesn’t appear to be specific to Roku or Fire; apparently an ongoing conflict with deactivated Satellite. No one at DIRECTV Stream has been able to resolve. About to execute final cancellation — after days of vacation time wasted. DirecTV should be harshly reviewed for what they’re putting long time customers through, while still charging a bundle for Stream. Clearly no regression testing. Had been with DirectV since ‘83 — loyalty now well beyond exhausted.
