TypeError: Cannot read properties of undefined (reading '0')

Hi,

We are seeing the error message mentioned in the subject for two types of charts (Area map and Scatter plot). For Areamap, this error is throwing up 16 times on hovering over the tool tip. For scatter plot, the same error is multiplying on hovering over each plot. In the developer tool, we are not able to exactly locate the triggering point for this error. 

Any help would be much appreciated.

Regards

subha