Export-PowerBIReport giving error “Export-PowerBIReport : Operation returned an invalid status code

When I am trying to access Export-PowerBIReport to export .pbix report file I am getting error "Export-PowerBIReport : Operation returned an invalid status code 'NotFound'".

I have PowerBI PRO account. I have install all power BI modules.Below is the code I have used . Please suggest.

Connect-PowerBIServiceAccount$wrkSpace = Get-PowerBIWorkspace -Name 'xxxx'$rep1 = Get-PowerBIReport  -Name "Report Test1" -WorkspaceId $wrkSpace.id 
$rep1
$rep1ID = [guid]$rep1.Id$wrkSpace.id 
$temp_path ='C:\test\test1.pbix' 
Export-PowerBIReport -Id $rep1ID  -WorkspaceId $wrkSpace.id -OutFile $temp_path