Step 2 - Create an Azure Group for PowerBI Portal and add the App Registration as a member

Next, you must create an Azure Group for the PowerBI Portal so it can access the Power BI workspaces you need to share.

Log in to your Azure Portal, go to Azure Active Directory, and select “All Groups".

Click “New group” and create a security group called "PowerBI Portal".

Fill "Group name" and "Group Description" fields.

Next, go to the Members section and add the application "PowerBI Portal App" to the new group: