I was getting this login error yesterday on my Chromebook, but not on my mobile phone browser. I cleared cache/cookies on my Chromebook and was able to login so thought it was that. (Though somewhere in here I tried a password reset and never received the email)

This morning I couldn't login on either device (app still seemed to work via biometrics anyway, didn't want to chance logging out in case I couldn't get back in) and clearing cache/cookies did NOT help. What did seem to make a difference was to VPN through my network at home, and to test that it wasn't just a coincidence of timing where whatever it was had resolved itself, I disconnected from VPN, couldn't login, reconnected, able to login again (without clearing anything in between this time)

Maybe they're considering your location/IP address now? I'm connected to hotel wifi, so I could understand if that's seen as riskier... but my profile in the app says that I have 2FA turned on, so shouldn't this have simply triggered a challenge so that I can go on my way? Rather than blocking the login without recourse. Since I imagine a lot of people try to access the website from public wifi in hotels and airports...