auto-refresh in PowerBI workspace with sharepoint data source

I don't think that link helps my problem. To be more specific, when I using the workspace in my internet browser and refresh the dataset, the refresh goes through but the data does not show up correctly on the graphs. However, when I refresh the same dataset but do it within the Power BI desktop application, the data reflects what is in the Sharepoint database and everything looks good. 

In the workspace, when I view the Dataset tab for this report, I see under the "Gateway connection" section the following: "You don't need a gateway for this dataset, because all of its data sources are in the cloud, but you can use a gateway for enhanced control over how you connect." So perhaps that is not the issue.

Under data source credentials,  I have edited my credentials to OAuth2 authentication method, but whenever I go back to check this again, the dialog box opens up and it shows "Anonymous" as the default sign-in. Does this mean I am not using OAuth2 authentication? 

My suspicion that the issue is somewhere here since again, I can refresh in desktop but not in the online workspace. Perhaps I am wrong though?