That should be an indication to you that it is not a problem with your account or the services, but something about the web browser and its configuration and extensions that is preventing use, or firewall settings or other interference in the network connections.
Try using or installing a whole new web browser on the same PC, an alternate, of Edge, Firefox, Chrome. Without changing any settings or installing any addon extensions. See if you get the same results.
From there you can decide how to proceed in solving your problem, isolating exactly where “something went wrong”.
Is this a serious response.
A lot of your user base is having this problem, and you dismiss this as not your issue.
I suggest you improve your support before losing your users.