Connect shared excel file to Power BI Dataflow

I need to connect one Shared Excel file to Dataflow in PBI Server. I have been trying with Excel Workbook and Sharepoint folder but not able to connect. When i try to connect using Excel workbook, getting an error like Unable to create an OAuth connection. Reason: "Connection could not be created. (Session ID: 7293c06c-0517-407b-82a1-7f76060d7b49, Region: us)" and connect using sharepoint folder, getting an error like Path invalid. But I'm able to connect the same file to Power Bi desktop Using Excel workbook but not able to connect to dataflow in Power Bi server.

Can anyone please suggest me how to connect the shared excel file to PBI dataflow in server?