My but cant move in BG??

I have this problem: When i start HB its queues fine and join, but afterwards it just stands still.
at TreeSharp.Decorator.#h.#nF.MoveNext()
at (Object )
at TreeSharp.Composite.Tick(Object context)
at TreeSharp.PrioritySelector.#h.#nF.MoveNext()
at (Object )
at TreeSharp.Composite.Tick(Object context)
at Styx.Logic.BehaviorTree.TreeRoot.Tick()
[23:27:15:969] Cleared POI - Reason Exception in Root.Tick()
[23:27:15:969] Cleared POI
[23:27:16:080] System.NullReferenceException: Object reference not set to an instance of an object.
at Hera.Fpsware.NeedToCancelDrink.CanRun(Object context) in c:\Users\Nicolaj\Desktop\Honorbuddy_2.0.0.5354\CustomClasses\FPSpriest\Class Specific\Behaviours\Common.cs:line 320
at TreeSharp.Decorator.#h.#nF.MoveNext()
at (Object )
at TreeSharp.Composite.Tick(Object context)
at TreeSharp.PrioritySelector.#h.#nF.MoveNext()
at (Object )
at TreeSharp.Composite.Tick(Object context)
at TreeSharp.Decorator.#h.#nF.MoveNext()
at (Object )
at TreeSharp.Composite.Tick(Object context)
at TreeSharp.PrioritySelector.#h.#nF.MoveNext()
at (Object )
at TreeSharp.Composite.Tick(Object context)
at TreeSharp.Decorator.#h.#nF.MoveNext()
at (Object )
at TreeSharp.Composite.Tick(Object context)
at TreeSharp.PrioritySelector.#h.#nF.MoveNext()
at (Object )
at TreeSharp.Composite.Tick(Object context)
at TreeSharp.Decorator.#h.#nF.MoveNext()
at (Object )
at TreeSharp.Composite.Tick(Object context)
at TreeSharp.PrioritySelector.#h.#nF.MoveNext()
at (Object )
at TreeSharp.Composite.Tick(Object context)
at Styx.Logic.BehaviorTree.TreeRoot.Tick()
[23:27:16:080] Cleared POI - Reason Exception in Root.Tick()
[23:27:16:081] Cleared POI