Error with bottom targetLine in suit charts

Hello! I’m using suite charts, and trying to add bottom targetLine. But i get error, when hover to vertical line. Maybe i’m doing something wrong? Can you help me please?
Example with error: DHTMLX Snippet Tool

Target line can be applied only to a scale with the numeric values:
https://snippet.dhtmlx.com/rb22rv1x

Thank you for answer! But if you try hover to “4” in your snippet, you got the script error

My apologies.
I was wrong. The targetLine/targetValue can be applied to the “Y” scale indicating the value of a series.