Measure in object "Viz: xxx" references non-existent Master Measure "yyy"
The chart object references a Master Measure that is not present in the Master Library.
This condition can occur when a developer removes a Master Measure from the library without realizing the Measure is in use.
Because Master items are referenced by id only, the original label or contents of the missing Measure are unknown.
The chart must be edited to remove or replace the Measure reference.