When scrolling (action menu) at an object - let's say its a door to a house that you spawned in for a mission - you don't get any options that you should. Instead you have to make your player become aware of the object's existence. A trick I discovered is that you have to right click at the object and make sure you know about it by pressing spacebar and seeing if the cursorTarget shows up.
Once your player knows about the object, then they will get the actions supplied from it.
Same goes with anything, gear, ammoboxes, ladders, doors, vehicles, everything.
Many people think the game is broken when they say "I can't access the ammocrate, your mission is broken.", but then I tell them that they need to right click at it for a bit and then scroll again.