Can't login to Windows launcher

[Danksalot2000]

I'm unable to login to the Steam Launcher on Windows.

The login pop-up opens, but the QR code never loads, instead being blurred out with a spinning circle over it.

I put in my username and password, and when I click the "Sign-In" button, the "Sign-In" label turns into a spinning circle that keeps going forever without doing anything.

I've waited up to 30 minutes and the spinnign wheels over the QR code and the Sign In button never change.

I've uninstalled and reinstalled the Steam Launcher, run as Admin, with and without VPN, reset my Network settings, and flushed my DNS cache.

Any other ideas I should try?