I have this workbook where I have blended two data sources, 1 Tableau server connection and 1 Custom SQL extract based on the other connection. Everything works fine until I try to add a row grand total column to my chart. I can work with the sheets and dashboards in Tableau but when I publish it and try to access it online I get the an error message. I've also attached a picture of my graph in case that helps.
Is this a known bug? Any ideas what might be the cause of the error?