Core/Errors: Stop using System.Diagnostics.Contracts, Its just closing the server without error or warning. We now log the error and then throw a exception

Source/Game/Movement/Generators/WaypointMovement.cs

@@ -278,6 +278,7 @@ namespace Game.Movement
 
             return true;
         }
+
         void LoadPath(Creature creature)
         {
             if (loadedFromDB)
@@ -298,6 +299,7 @@ namespace Game.Movement
             if (!Stopped())
                 StartMoveNow(creature);
         }
+
         void OnArrived(Creature creature)
         {
             if (path == null || path.nodes.Empty())