I have attached a screenshot of the data error. If you look beside the Tesla-sales data, you’d see a red exclamation mark that indicates the error. The lesson is Tableau Exercise (creating table).
Were you able to solve this issue?
Red exclamation marks will appear when something is invalid. Hover over the red mark to view the exact error. Such exclamation marks can occur in the following scenarios.
Chances are that one of your calculated fields is invalid or has an error in it.