is this free do i need any dlc?

nice very creative!! thx

Like in the 6th picture, the center of the helicopter (the icon) needs to be inside the open area. If the heli (from the center) is detected on the ground, you can't use the ropes. But with Arma's logic, if a chopper is in the air he will take off and hover in the air, so I placed a concrete panel to prevent that, but is removed with a trigger

Well I fixed the problem with composition not working correctly, that's okey, but how can I rappel? When I place the helicopter like you said, I cannot drop the ropes from heli bcs it is not in the air, how did you do it that it works?

To work in multiplayer, a scaled object needs to be attached to another object with the attachToRelative call. Always used this technique when making missions for my unit, and never failed for me. What is it doing to you ?

Dude nice composition, but you are doing it wrong, when scripting the items itself (platforms p1 - p6). Basically your composition is broken, all what it takes to work is to delete this from init of objects - [this, t1] call BIS_fnc_attachToRelative.
Then everything works.

@Collo make sure on your dedicated server scripted comps are enabled

https://www.youtube.com/watch?v=-SZrnZPvA80

The code you need for the description.ext is:
zeusCompositionScriptLevel = 2;

Well, test it before assuming I'm lying. Scaled objects that are attached to another object works in multiplayer. It will ignore colisions with vehicles tho, hence why I placed cobblestones inside the platforms. If you still think I'm lying, you can check the stream of my unit where I used it in tonight's mission https://www.youtube.com/live/QJpizznU6JA?si=Db3OSuKmWNyzN5CD&t=750 :)

Tested on a dedicated server, works like a charm