The missions do not include any maps or assets so you need to get the maps separately to play the missions on them. Stratis and Altis should both work without any additional mods, also Tanoa if you have the Apex expansion.

You need 'CUP Terrains Core' and 'CUP Terrains Maps' mods (both available in steam workshop) to get Chernarus, Takistan, Zargabad and Sahrani missions working. The rest of the missions require you to get the specific custom map for them (and they also usually require the CUP Terrains Core). Not all of the maps are available on steam workshop.

Okay thanks