There was an error when processing the data in the dataset.

Hi everyone,

The data source of my PowerBI report is an Excel file hosted on sharepoint.com.

When I work on the PowerBI Desktop report, I have no particular issue.

But the PowerBI report fails to refresh on schedule.

(I use OAuth2 as authentication method.)

Here is the error message I get:

Something went wrong
There was an error when processing the data in the dataset.
Please try again later or contact support. If you contact support, please provide these details.
Processing error: COM error: Microsoft.Data.Mashup; Value cannot be null.
Parameter name: json. A connection could not be made to the data source with the Name of '82ab71dc-71d2-4ad5-986f-efea983865d2'. COM error: Microsoft.Data.Mashup; Value cannot be null.
Parameter name: json. A connection could not be made to the data source with the Name of '4063e7b5-075e-4551-91b5-43fdfd454b87'. Table: Result.
Cluster URI: WABI-NORTH-EUROPE-redirect.analysis.windows.net
Activity ID: 3f6e1367-33f5-4ef4-8ea6-de01371a18de
Request ID: 567c224a-c059-4541-8c41-aa95469a9169
Time: 2019-03-06 23:20:45Z

Does anyone know what to do/check?

Regards.