Data flow suddenly stops working - error message just "There was a problem refreshing your dataset"

Hi dancarr22 ,

According to your description, here is my suggestion.

1, I suggest that you can first check if the “enhanced compute engine” in dataflow settings be accidently shut down. To user Direct Query with dataflows, you must explicitly toggle the “enhanced compute engine” to on in dataflow settings and you must then refresh the dataflow before it can be consumed in Direct Query mode.

2, It may be caused by too much data volume.

3, You can check whether the gateway works fine refer to following document.

Please refer to the following documents.

Troubleshoot the on-premises data gateway 

Using DirectQuery with dataflows - Power BI | Microsoft Learn

Best Regards,
Community Support Team _ xiaosun

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.