ok, I changed the proxy settings for the Service account with which PBIRS is configured. Now I get the below error when i try to test connection with data source.
2020-09-01 08:26:01.9101|ERROR|55|OData exception occurred: System.Net.WebException: The remote server returned an error: (403) Forbidden.
I tried to use Basic Authentication and gave the account/pwd for accessing the API.
Once again, when I try to access normally from browser, I can access the API URL. Any ideas?