I am getting page loaded with blank white.After sometime it is asking for the server user name passowrd. I tried the option with fiddler also.
Note:It is working fine with UAT env and causing this issue in PROD.Need resolution immediately
In order to troubleshoot that issue i would suggest you to replay an existing script against that same URL or even manually create the request in NeoLoad.
I would expect a useful error message when replaying the URL from NeoLoad and probably a network issue.