PowerBI Dataflows are getting an error with no error message

Hello,rajendraongole1 ,thanks for your concern about this issue.

Your answer is excellent!
And I would like to share some additional solutions below.

Hi,ucmaoTWG .I am glad to help you.
According to your description, some of your dataflow in Power BI Service started to have problems this week, which was not a problem before. This is indeed very strange, please check the relevant configuration again and try the following actions
1. Data source connections and credentials:
Make sure all data source connections are working and credentials are not expired.
2. Try to adjust the Scheduled Refresh of the data streams to avoid refreshing multiple data streams at the same time during the peak period, and try not to exceed your License capacity limit.
It can't be ruled out that there is an issue with the current Power BI Service itself.
Therefore, contacting Microsoft Power BI Support is a better solution, because for the time being, there are only the Request ID and Activity ID in the error message, but no specific error message, so it is impossible to locate exactly which aspect of the problem has occurred.
The Link of Power BI Support:

Microsoft Fabric Support and Status | Microsoft Fabric

I hope my suggestions give you good ideas, if you have any more questions, please clarify in a follow-up reply.

Best Regards,

Carson Jian,

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