Mesh Deform Modifier does not work

Hi there,
I try to follow this tutorial, to create an eybrow

everything works fine until the part, binding the hair to a cage with the help of a Mesh Deform modifier (min8:20).
Dont know why, but the modifier does not work.
I am using blender 2.82 and tried to convert the curves into mesh as well with no luck.
Any idea how to fix this ?

Thanks in advance

Works fine for me.

Make sure the modifier is on the eyebrows line object and the target is set to the controller before binding.

Thanks a lot for your answer. The problem seems to be with the extruded plane “cage”.
Doing the same with a new created mesh box , it works fine.