← All Power BI refresh errors
Connectivity
DM_GWPipeline_Gateway_MashupDataAccessError
Power BI dataset refresh error — what it means and how to fix it.
What this means
The gateway's mashup engine could not negotiate TLS / a certificate with the source (e.g. Databricks — TLS 1.2 or certificate trust).
How to fix it
- Enable TLS 1.2 on the gateway host.
- Trust the source certificate chain on the gateway host.
- Update the gateway and the data-source driver; check for an HTTPS-inspection proxy in the path.
Related connectivity errors
- DM_GWPipeline_Gateway_DataSourceAccessError
- Login timeout expired
- The server was not found or was not accessible (SQL error 40)
- Connection denied — Deny Public Network Access (Azure SQL)
- The certificate chain was issued by an authority that is not trusted
- The server name doesn't match the SQL Server SSL certificate
Catch this automatically
RefreshRadar monitors every Power BI dataset refresh and alerts you the moment one fails — with the likely cause and the fix — so you never hear about a broken refresh from your stakeholders first.
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