Quickbooks Desktop has locked me out

I have Quickbooks Desktop Premier Contractor Edition 2020. For my main business we "upgraded" to Quickbooks Online, but I kept Desktop for personal and because I lost so much data when we "upgraded" that after years with Online, I still need to log in to our old company file to get information. We started a new business, so I just created a new company in Desktop, because it's super small and so far doesn't have any income, so I don't want to add any expenses that aren't necessary. After I logged in with my password for the company file, it would pop up a box about setting up an Intuit account. I would type in my user name and password, and it would take me to another screen, and the only way I was able to get off that was to click cancel.

Now, when I enter my username and click continue, it just shows the thinking screen forever and never lets me enter a password, so I am unable to access my account. What can I do? I can't access my company file at all now.