API is not working using soapUI but is fine when API is called using Postman

Thanks Rao after setting to HTTPS it is now working.

But now it is throwing a different error:

{
"error": "invalid_granttype",
"error_description": "Please enter valid Grant Type"
}

and looking at the representation:

do you know why?

There is no raw data in postman as i was using "x-www-form-urlencoded" option in the body entering the key and the value based on my request.