I am also experiencing a refresh issue in Power BI Service. In Power BI Desktop, the Dashbaord refreshes no problem, but has continually produced Refresh errors when refreshing on the Power BI Service since Nov. 21.
I have pasted the following message from the Power BI Service below:
"Underlying error code: -2147467259 Underlying error message: The import List.ConformToPageReader matches no exports. Did you miss a module reference? DM_ErrorDetailNameCode_UnderlyingHResult: -2147467259 Microsoft.Data.Mashup.ValueError.Reason: Expression.Error Cluster URI: WABI-CANADA-CENTRAL-redirect.analysis.windows.net Activity ID: 99afeb2e-1d78-4586-9a6d-ec3830ee7273 Request ID: 7aa7d47a-84e8-4d75-b444-001aaff591fc Time: 2020-11-25 21:17:33Z"