Could not find MonoBehaviour

I’m using standard assets. When I’m building my project on PC i dont get any errors. When i switch to android i get many errors from standard assets files, they all are like: “Assets/Standard Assets/Utility/WaypointCircuit.cs(11,36): error CS0246: The type or namespace name `MonoBehaviour’ could not be found. Are you missing a using directive or an assembly reference?”

Nailed it… just reinstalled android module.