and the actor does not see the menu as seen in the image
Sorry I made a few mistakes. First you need to click on the collision component which in your case is caja_collision, then look up collision in the search bar and it should show up. You might need to this for you static mesh component as well.
Second you don’t need to change visibility channel collision. You need to change Camera channel, That’s the one right under visibility. Basically something like this:
Change other channels/profiles response based on your needs.
As for why your character falls through the ground, that’s because you set “Collision Enabled” property to “No Collision” which means your character ignores everything. (You don’t need to change your character collision to fix this problem anyway)