Why doesn't Platform Effector 2d work?

Question

Unity

Hello. I'm making a 2D platformer. I want to get rid of the possibility of pushing off from the sides of the platform (i.e. if the character started to fall, then so that it would not be possible to get out by jumping) - added platform effector 2d, ticked the checkbox use one way and sides - use Side Friction - and you can still get out ((((How can I fix it?