SYMPTOMS
When users run a Dashboard in Strategy Visual Insight, click on a point on a graph and select "Show Data", they receive the error message:
"Failed to load object from XML"

ACTION:
The issue could be related to the fact that a wrong data type has been selected for the attribute. In this case, the ID form of the attribute used an ApplySimple to convert a DateTime into an Integer. The datatype of the column alias was still set to Timestamp.
Modifying the datatype to integer solved the issue.