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

[Stevenbdl]

Line issue:
endX = this.endNode.x,
Line where is issue

My solution:
endX = this.endNode?.x, endY = this.endNode?.y
For more details

[lafkpages]

@Stevenbdl some code would help

[ZoranRavic]

That error is probably caused by the hack that you described in the other issue that you opened #199

Either way the root issue likely on your end. (see my comment on the other issue)