Getting an error on AstarPathEditor.OnEnable

I’ve recently bought the A* Pathfinding Project Pro and downloaded 3.7.2 and imported it into my unity project.

I’ve followed the getting started tutorial but the A* object gives me an error every time I play my project

NullReferenceException: Object reference not set to an instance of an object
AstarPathEditor.OnEnable () (at Assets/AstarPathfindingProject/Editor/AstarPathEditor.cs:105)

I’ll highly appreciate it if someone can help me solve this =o

Edit: I’m using Unity 5.1.2 if it matters =o
Edit: The thing that seems to be null is target… which is very weird, I’ve temporarily resolved it by making it check if target is null at the beginning of OnEnable return if that’s the case - though I’d like a proper fix?

Odd that the “target” variable is null… That should not happen, it is set by Unity.
You could try to delete the AstarPathfindingProject folder and reimporting, that might fix it.