Desktop app on Mac crashes when trying to link a second account

I am having the same issue on 197.4.7629. I believe the issue is that my personal account is eligible for the switch to File Provider, but my work account is not, because it has over 500,000 files. If I sign out of both accounts and sign into my personal account first, my personal Dropbox folder appears in Locations, but trying to sign into my work account puts me in the sign in/crash loop others have mentioned, plus an extra dialog asking me to choose specific folders to sync since I am over the 500,000 limit. However, even if I only choose a single folder with a single file in it to sync, my work Dropbox only briefly appears in Locations with my personal one before the app crashes, my work folder disappears and I'm back to square one with the sign in loop. 

However, if I sign out of both accounts and sign into my work account first, it puts my work Dropbox back in my user folder where it was before, and syncs normally even with over 500,000 files. In Sync under Preferences in my work account, I also see a message that that account is not eligible for the switch to File Provider. With my work account functional, if I then try to sign in to my personal account, the same thing happens in reverse - a folder is created in my user folder for my personal Dropbox, but the app crashes when it attempts to sync anything and puts me back in the sign in loop. The personal folder also disappears from Locations in this scenario.

The problem is obviously a mismatch between my two accounts - my personal account is trying to use File Provider, while my work account can't. Is there a way to roll back my personal account and force it not to use File Provider so that both accounts keep their old locations in my user folder until my work account is eventually eligible to be migrated as well?