Trying to add Pro paid plan User in Free plan as a user

Description
When I try to add the pro plan owner as a basic user in the Free plan, we are getting error.

Error
Unknown Error

We are trying to do it in the web app directly, not through API

Screenshots (If applicable)

Hi @integrationAnywhere, this forum is best used for API & developer topics. I’d reach out to Zoom Customer Support for help here.