Urgent: Power BI Fabric Dataflow Refresh Failures - MashupException.Error with a 403

Hi tayloramy ,

I have checked and tried all things you listed above. Currently, the owner of dataflows/data warehouses/lakehouses is also Admin of the workspace with full access rights.
About the DataflowStagingLakehouse has been taken over by the Admins of the workspace after facing with the issues and after that we have raised ticket to Microsoft Support team.

1. We have already tried to process somethings:
   Access Manage connections and Gateways >> Check status to ensure all connections from Web/SharePoint are Online and active with Signed In of Admin Account with Authentication method: OAuth 2.0 / Privacy level: Organizational.
2. Inside the dataflows, we have unlinked all connection and re-link again with the Authentication: OAuth 2.0 , some dataflows can refresh successfully some tables inside the dataflows but with the last table which is ready to load to the data warehouse failed again with the error message:  MashupException with “Microsoft SQL: Internal system error (0xa) (MWC service error: Server responded with error: 403)
3. Re-entered all AOuth account, refresh successfull inside the dataflows, preview data table without errors... Published the dataflow again and still failed in refresh after that with the same error

Thanks again for your resoponse and guidances, but could you please recommend any other solutions which are able use PowerShells to investigate or detect all thing behind the scense and transfer the identity users / owner to the right one to solve the current problems?

Hope to hear from you soon!
Many thanks!