I have the same issue.  This happened back in July and again two days ago.  I get the qbmapi64 error message and then QB closes down.  Cannot get into Preferences to even check settings.  I did the update but that didn't fix it.  Cannot connect to chat....call back not available until Monday.  You would think a service like Quickbooks, that so many depend on. would be available 24/7.  I have Quickbooks Desktop Pro Plus 2022....this is really bothersome.