On this page, you will find more information about the most common causes and most relevant solutions for the Zoom error '21 - User leaves the meeting when waiting for the host to start'. Do you need help straight away? Visit our support page.
The Zoom Video Communications documentation indicates that error code '21 - User leaves the meeting when waiting for the host to start' is caused by the following problem: "None".
Do you think there is another cause for this error? Let others know in the comments.