SAP BW parameter issue while trying to Access SAP BW report

Dear Senior Community Members,

      I have established a connection between power BI & SAP BW. I am able to see all the cubes & under them their corresponding reports too. Problem is that i am not able to access any of the report. Every time i click on any dimension or measure ,power bi throws a pop up saying "a required Parameter is not provided" as an error.

  Neither any window is showing up for passing the parameter nor i am able to understand how to proceeed further. Also, I wanted to know , when I connects to SAP BW through power BI, am i  able to connects to report inside the cubes only and not to SAP BW Tables???

Please furnish some knowledge on this too. Find below the parameter error. 

Tagging you people    as i strongly believe you must have some thing in your knowledge base to help me out. 

Regards,

Hemant