Error code 4 indicates that a user cannot sign in to the Zoom client. In some instances, the user can still sign in on the web client.

How to fix it

To fix it, download and run CleanZoom (updated November 30, 2023),  then reinstall the latest version of Zoom.

If the issue persists, submit a request to Zoom Support for troubleshooting assistance. Please provide the following:

• What operating system you are using
• What you were doing when you received this error
• Meeting ID, if in a meeting or trying to join/start a meeting