I am designing a new Dashboard with an Excel file on a server. I have installed On-Prem Gateway onto the server and Power BI Pro Shows it as "Online: You are good to go". Through the scheduling tab it shows that the Excel file is configured correctly. Then I add a new datasource I receive an error of "Invalid Connection Credentials" when I use "File" and full server name\file name for the file. I have tried the server credentials, my Power BI credentials and gateway credentials, but the file itself doesn't have credentials associated with it.
I am not sure the next step to resolve this issue and I am new to using gateways.