Do you use Cisco WebEx Meetings Server (on-premise solution) or WebEx SaaS (WebEx in the Cloud)?
The only thing that comes to my mind is that someone is inviting you as an alternate host to meeting. I would check with the persons that invited you to these meetings if they assigned you alternate host privilege.
In Cisco WebEx Meetings Server we are not aware of any issues of this kind, but I am not sure about WebEx SaaS. If you use WebEx SaaS, you may want to call into WebEx Support to investigate this further.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.