XMLA Endpoint Error in Power Bi Report Builder

[Anonymous]

When I build the analysis service connection using the workspace url using premium capacity, I initially get a pop up that "Test Connection Succeeded." However, on data source properties I get an error when attempting to test the connection... "Unable to connect to the data source. Please verify the connection properties and credentials. In the Credentials section I left the default option checked, "Use current Windows user. Kerberos delegation may be required." 

Any suggestions?