How to connect the AzureDevOps Board with Power BI.

I want to fetch the Work_Item_ID and Work_Item_Name from Azure DevOps into Power BI. When I tried to connect, it is showing the below error.

And also, I have another doubt in Azure DevOps.
I am currently using the Version Dev19.M226.1. The Get it Free Option is disabled for me in Marketplace. Where should I enable the Analytics view?

 I see the View analytics being allowed for a particular project within my organization, but I am unable to see the option neither in Overview nor in Boards.

 I also couldn't see the option in Preview features

Anyone please guide me through.