Body
Open Preferences > Security & Privacy > Screen Recording and check that zoom.us.app is allowed to record your screen. ![Preferences > Security & Privacy > Screen Recording](https://i.stack.imgur.com/Kv1Uf.png)
Also check on Preferences > Security & Privacy > Full Disk Access an allow zoom.us.app access. ![Preferences > Security & Privacy > Full Disk Access](https://i.stack.imgur.com/rgbkS.png)
Lastly, check Preferences > Security & Privacy > Files and Folders and check that zoom.us.app has access to the download folder (presumably to receive files).
![Preferences > Security & Privacy > Files and Folders](https://i.stack.imgur.com/pPjuu.png)