Not able to join meetings

Meeting SDK
1

Meeting SDK Type and Version
Zoom Web Meeting SDK - 3.1.6 Client View

Description
For some of the meetings, Websdk sdk is showing following error dialog

Something went wrong
The server encountered an internal error and was unable to process your request.
Error Code:6603
2

When checking this issue on the latest version (3.9.2) using the sample app, I got the below dialog error.

image
image480×219 13.7 KB

We are unable to find any documentation regarding blocking of Meeting SDK keys.