Getting "sorry, but we're having trouble signing you in." with Edge profile

I am a computer consultant and have a separate Edge Profile for each administrator account at each of my clients' 365 tenants, plus my own 365 tenant. mailto:Email address removed, mailto:Email address removed, mailto:Email address removed, mailto:Email address removed and so on. This works out fantastic and I have it setup this way on four computers. Flawless. Love it.

But I'm setting up a new laptop and have successfully setup several Edge Profiles, but when I try to sign-in/sync the Profile for mailto:Email address removed I get an error, "Sorry, but we're having trouble signing you in" and it indicates that xyz_admin doesn't exist at mycompany.com.

I don't know why it's looking for xyz_admin at mycompany.com. I've removed the Profile several times, and I've had no problems with other Profiles, and the xyz_admin Profile works fine on my other computers.