Hosting a zoom meeting: Participants trying to join are told I am on another meeting when I am not.

I have seen this issue. There are several possible causes. If you simply leave a meeting instead of ending it, the meeting can be detected as still going when trying to launch a new instance. The most common cause I have found is that the host created a meeting with a co-host and the co-host kept that meeting going while the host tried starting another. If you have back-to-back meetings scheduled with "join before host" enabled this can cause users in the second meeting to get the error.

This has happened ever since I renewed my pro account. I'm not using co-hosts, nor am I in any other meetings. It's only when I pre-schedule meetings. It very frustrating.