Hi @pkalyand,
This is actually an expected error when you touch the limit of maximum allowed registrations or, devices with a single token.
Actually you can run this API URL - https://wdm-a.wbx2.com/wdm/api/v1/devices with /GET request using your Bot token from POSTMAN and check the list of registrations already done with the Webex Bot.
Once you've the list, you can actually free-up some space by making a /DELETE request on the same API URL and using the same BOT token.
You can actually refer to this thread as well - https://community.cisco.com/t5/webex-for-developers/faq-thread/td-p/4558598#:~:text=An%20error%20message%20%22Unable%20to%20register%2C%20user%20as%20excessive%20device%20registrations%22%20is%20shown.%20What%20can%20I%20do%3F
So basically, are you using it for Webex Browser SDK?
If yes, then possibly you're registering the meeting while initiating a call/meeting with a token, but not calling the unregister() function after leaving the meeting. If you take care of that part - you'll be able to avoid such error in future.
Regards!
Sandip
