Data Sources: Unable to connect to the remote server

Hello I am getting the error in Report Server while selecting "manage" on the uploaded Power BI Report.

Notes:

I have built the Power BI Report using Direct Query via Azure SSAS. I can also confirm that I can access the cube information with the same credentials via Sql Management Studio.

1. Can confirm that Azure SSAS is a supported direct query function for Power BI Reporting Server.

2. I have tried both Windows Authentication and SQL Authentication.

What am I doing wrong. I have been trying to figure out a way to resolve this for weeks.

Please help me to resolve the issue