Hey @priya.jetley,
It looks like the Webinar (0126D4CB-67E4-4303-80CF-A5CD34D59372
*ASbUy2fkQwOAz6XNNNWTcg==) has not been started yet. So the error message “Meeting ID is invalid or not end.” makes sense because the webinar has not happened.
The Dashboard APIs are for Live or Previous Webinars, and the Reports APIs are for past webinars.
Are you trying to get Webinar Registrant Data before the webinar happens?
Thanks,
Tommy