Linetrace not working with Blueprints

Hi everyone!
I have an urgent problem.
I was working on toggle the visibility of a mesh component of my blueprint when the player is pressing the mousbutton. But now I somehow destroyed my complete project. My player is raytracing to check for the mesh components, but now he doesn’t hit them anymore, even after I have deleted all the visibility toggle stuff.
I have checked the problem with an other blueprint where i have never implemented something that effets the visibility but even there the raytrace doesn’t hit components of a blueprint.

Does anybody has a clue what I have done wrong?

Hope someone here has a quick answer