Mods required for the assassination maps to work:
https://www.gta5-mods.com/tools/map-builder 
https://www.gta5-mods.com/tools/updated-object-list-for-map-editor
https://www.gta5mods.com/scripts/open-all-interiors 

I Recommend you Download Maximum Wanted Level/Never Wanted when you play these maps or turn on the Never Wanted Button in Native Trainer. 
https://www.gta5-mods.com/scripts/maximum-wanted-level-never-wanted 
