Every day failing the datamart refreshing, it ends with error message: it is the same for schedulled refreshing and for manual refresh. Additional error messages what I often get: U...
Hi Peter_Novak ,
This seems to be an issue that occurs specifically with you, and no feedback has been received from other users with similar issues at this time.
Based on the above information, if you are a Power BI Pro licensee, you can create a support ticket for free and a dedicated Microsoft engineer will come to solve the problem for you.
It would be great if you continue to share in this issue to help others with similar problems after you know the root cause or solution.
The link of Power BI Support: Support | Microsoft Power BI
For how to create a support ticket, please refer to How to create a support ticket in Power BI - Microsoft Power BI Community
Best regards.
Community Support Team_ Caitlyn