Hey @Chandana , Welcome to Postman Community!
I was unable to understand the full context, but from what I understood, looks like the place where things fail, the URL in questions is not reachable.
Do things work locally on your Postman app and fail on Monitor? Or is it the reverse?
Check the Postman console and provide a screenshot here, that would help people understand where and what is failing.
Console may be opened by clicking on the “Console” icon, located at the bottom left
Alternatively, you may open the Console Window by navigating to
View → View Postman Console from the Postman app (native app only)
Also check this, to find out how to troubleshoot common errors when sending requests fails: https://learning.postman.com/docs/sending-requests/troubleshooting-api-requests/