Get-PowerBIWorkSpace - Scope Organization error

Hi Folks!!

I am normal power BI User and trying to retreive infomration using above commands

Step 1 :  Logged in via Connect-PowerBIServiceAccount

Step 2 : Execute Get-PowerBIWorkspace -Scope Organization

             Getting below error 

More detail of the error as below 

Please suggest!! What needs to be done to get rid of this error.

Thanks

Amit Srivastava