Please download the report and open it in Power BI desktop, click on Refresh button.
If it's can be refreshed successfully, please republish the report to Power BI service, click on Refresh Now for the dataset to see if the the same issue occurs.
By the way, please keep using the latest gateway version.
We have been having the same issue the last 5 days, refreshing the datasets offline and publishing them again updates the dataset but the scheduled refreshes still fail. Restarting the gateway seems to work for a while, but then most of our refreshes the next morning fail with the same error. Also - the table mentioned in the error is a different table each time you attempt a refresh, and the tables are from different sources so I can't see it being caused by one particular datasource. We have the latest gateway update running.
If there is an old gateway version installed, when we run a installer for a new gateway version, it should install as "upgrade". You can go to Control Panel check gateway version after installation is completed.
I see the same dataset was be refreshed successfully on 1/15/2019 and 1/16/2019, the issue sames to be happen intermittently. I would suggest you create a support ticket to let engineers look into the issue on your side.
@Anonymous Please create a support ticket as well.