Gateway connection for web data source

Hi All,

We have a data source for a Power BI dataset this is a separate SSRS report. We are unable to get access to the full database used by the SSRS report, so we need to import the SSRS file as a data source.

I have setup a ‘Web’ connection in Power BI desktop that will connect to the SSRS web server and download the data as a CSV file. The URLs are static and would not change. 

While creating gateway connection for web server we are getting Time out error as shown below. Can anyone suggest me how to troubleshoot the issue.

Thanks in advance!