UNABLE TO JOIN MEETING - SAYS NEED UPDATE

I keep getting an error message when trying to host a meeting or join a meeting that I need to update my Zoom account. I have a paid Pro account and it is suddenly giving me problems. I do not know how to "update" the Zoom app. It keeps telling me to contact my "Admin" ... but I have no Admin but myself. I cannot reach any kind of help via an agent and am ready to can cel my account. Help!