Hey there @Jprietz!
My apologies for the trouble you’ve had with your login! Being able to manage your services online is key to any product in the internet era, so we definitely want to help!
That error code is usually associated with retrieval errors within the user database! I’m glad you’ve managed to get a case opened for this, as it typically requires high level assistance (if it does not resolve itself, as a minor bug that can cause this issue sometimes does).
It sounds like you’ve taken all the necessary steps to get this resolved, kudos! However, I understand the frustration with sometimes long waits on these matters.
For an update on the case progress, or possible extra assistance, please contact us at 877 273-2728!
I appreciate you bringing this to our attention, and I hope you have an amazing day!
Kevin, AT&T Community Specialist