"We could not verify if your account has been used on this device before." - no matter how many times I add my PC to authorized devices

I tried to login to Teamviewer today only for it to tell me that my password was wrong (it wasn't). So I reset the password. But now I'm stuck in an endless loop. Every single time I try to login it tells me that my device isn't recognized, then sends me the email to add the device to trusted devices. I have added this computer to trusted devices several times now, and every single time I try to log in to Teamviewer, it gives me the same message and sends me another email.

What is going on, and how am I supposed to fix this? Is this related to the security issues this program has apparently been having? Should I just delete this asinine software and try something else that will actually work?