Dataset refresh fails with 'internal service error' on shared capacity Workspace

Hi,

We are in the process of migrating from the on-premise Power BI Report Server to Power BI in the cloud and cannot get the main model dataset to refresh.  The model was built in SSAS and has been converted to Power BI Dataset, on a shared capacity Workspace.  Unfortunately, the refresh keeps failing with an 'internal service error... try again later' message, which does not help the issue diagnosis.  We did try using an Embedded capacity, but it continued to fail, possibly due to the SKU A1 configuration.

This has been logged with Microsoft, but they are yet to get back with a suitable solution.  The model itself is less than 1GB on-prem, so size should not be an issue.  We do have one or two tables with over 3M records, but that should not prevent a refresh.  Data sources are hosted on Azure SQL servers.

Regards, Pete Everett.