Ok, i 'm a bad editor but it work's...
So i call better editor in ArmA Community to fix this example

Open eden editor
Select a map
place 4 units (configure for playable) and name it player1, player2, player3 and player4
place 4 module respawn position and name it P1, P2, P3 and P4
configure respawn module (type: infantry, camp: BLUFOR, Show: allies)
Sync P1 with player1, Sync P2 with player2, Sync P3 with player4

Menu>Attributs>multi
select cooperative mission (min player: 1 max player: 3)
select personalised respawn and select just choose respawn position
set respawn delai to 10 second
and select resurrect for all player

Save your mission and name it COOP_OPCOM

Go in your mission folder
C:\Users\Utilisateur\Documents\Arma 3\"myprofile_name"\missions\COOP_OPCOM

Create init.sqf file in folder mission and paste this 2 lines
execVM"onPlayerKilled.sqf";
execVM"onPlayerRespawn.sqf";

Create InitPlayerLocal.sqf file in folder mission and paste this line (for no fatigue)
player enableStamina false;

Create onPlayerKilled.sqf file in folder mission and paste this line (for arsenal)
[player, [missionNamespace, "inventory_var"]] call BIS_fnc_saveInventory;

create onPlayerRespawn.sqf file in folder mission and paste this 3 lines (for arsenal and no fatigue)
[player, [missionNamespace, "inventory_var"]] call BIS_fnc_loadInventory;
player enableStamina false;
["Open",true] spawn BIS_fnc_arsenal;

Place OCPOM module in eden editor
Export your mission in multi

Host your game
Invite 2 players except the last for ai
Start your mission
Choose P4 (respawn point for ai) to enter in map
Only the hoster (you) use OPCOM dashboard
Go settings in OPCOM menu and desactivate all respawn system (very important)
Don't touch squad management
Choose your objective mission and play
Teleport system doenst work with player (only AI) use support to travel.

AND congratulate KingOfNuthin for this fabulous mod