Zoom error 1132 on iMac

Since a few weeks I get this error 1132 too on my iMac when starting Zoom. Before that it worked perfectly and I used it to give online piano lessons. Now I use Zoom on an iPad, no problems on that device, but less practical because of the smaller screen. I’ve got a licence for Zoom. Tried everything to get it going again on the Mac but nothing helps. But maybe this is the answer to the problem:  when I start Zoom on my iMac from the program folder, I get a warning:  Zoom.us.app cannot be opened because the power PC programmes are no longer supported.