Hello there, kmottola.

Our engineers are looking for the root cause and have been investigating what prevents QuickBooks Desktop 2020 from syncing apps via the Web Connector. I'd suggest reaching out to our Phone Support Team so they can add you to the notification list. Updates will be sent via email. 

Here's how:

1. Go to the Help menu and select Contact us.
2. Enter a brief description of your concern and click Continue. 
3. Select the best way on how you'll want to contact us. 

Feel free to click this link for more details about our support hours and types. 

Thanks for your patience while we're looking for a permanent fix to this issue. If you need anything else please don't hesitate to post them here.