Anytime I try to load into a mission on my server it kicks me out to the mission selection screen. This happens on base Arma Missions and missions that I have created.
This approach doesn't consider "action markers" as Blufor position, Unknown position, supplies, vehicles, etc.
To add these kind of markers:
In the World Editor, and through the Resource Browser area, go to ArmaReforger > Prefabs > ScenarioFramework > Components;
Drag and drop somewhere on the map an Area.et;
Drag and drop a Layer.et into the Area created in the Hierarchy tree;
Now, for each faction marker you want to create, do it:
Drag and drop a SlotMarker.et into the Layer recently created and listed in the Hierarchy tree;
Click over that SlotMarker created, go to its properties, and click on SCR_ScenarioFrameworkSlotMarker;
Through the Map Marker area, give the marker a name, and select its icon, and color.
P.S: for some reason, the "Faction Key" field shouldn't be used, otherwise the marker won't be shown for any player, even the configured faction.