Organization login does not appear when trying to add exchange-account to mail on MacOS

Hi,

My workplace (using Exchange) recently added two step verification on our accounts, and ever since (before it worked without problems) I have been unable to access the account from the mail-app, or get the calendar on my personal Mac. I can add it on my iPhone, but when my workplace-sign in is supposed to pop up on my Mac, all I get is a blank screen (see attached image).

Does anyone know how to fix this? I found a similar post in the Apple Support Community but I can't see any follow-ups on how to solve this. Thank you.