Backup of Sharepoint 2013 fails with 'Unable to query the Team database meta-data' on 'Workflow Service Application Proxy' component
Backup of a Sharepoint 2013 Farm fails with 'V-70-57344-794 - Error: Unable to query the Team database meta-data' on the 'Workflow Service Application Proxy' component.
Deselect the 'Workflow Service Application Proxy' component from the Farm backup. The backup job will then complete successfully. Although this component is a part of the Farm configuration, it is not a critical component and deselecting that will have no effect on the backup\restore capabilities of the Content DBs that hold the user data.
There are no plans to address this issue by way of a patch or hotfix in the current or previous versions of the software at the present time. However, the issue is currently scheduled to be addressed in the next major revision of the product.