Since I have a full subscription yet Zoom says I can't speak to them . . . .

Occasionally and more often recently, Zoom does not recognize me as the Host. When starting a meeting I have scheduled, it tells me to wait until the host begins the meeting . . whether from my iPad or the iMac where I scheduled the meeting. If I go to the Scheduled Meetings page and try to start from there, I get a spinning wheel and finally a non-responsive notice and require a Force Quit. Any thoughts? I'd really like to keep using Zoom but this is unacceptable for clients communication.