dashboard buttons "new meeting" and "Schedule" do not work

[pbanas]

I am running Zoom 6.3 on a desktop Mac with Sequoia 15.2, but I've had this problem for a year after an update a long while back. I have deleted and reinstalled the app  but that does not work. 

On my dashboard:

1. Schedule is greyed out and the button does not work

2. New Meeting looks fine but does nothing (the sub-button "start video" and "use my personal ID" are there) 

The menu items (Schedule and Start) are greyed out. I can only start or schedule a meeting by going to the Zoom.us browser page.

Join and Share Screen are fine. 

Any ideas?  Thanks, all!