To run the Maghreb Map, you must own all official map DLCs released by SCS Software up to that point.

The for Euro Truck Simulator 2 (ETS2) v1.46 is a major community-driven map expansion that adds Northern African territories to the game. Core Features & Regional Coverage

While earlier 0.3.x builds focused on content expansion, the 0.3.2 release was primarily a stability and compatibility update: