Dialogue System Error

[Albyd]

I'm having a hard time with this Dialogue System error.

ArgumentException: Object of type 'UnityEngine.Object' cannot be converted to type 'PixelCrushers.DialogueSystem.Usable'.
System.RuntimeType.CheckValue (System.Object value, System.Reflection.Binder binder, System.Globalization.CultureInfo culture, System.Reflection.BindingFlags invokeAttr) (at <d6232873609549b8a045fa15811a5bd3>:0)
System.Reflection.RuntimeMethodInfo.ConvertValues (System.Reflection.Binder binder, System.Object[] args, System.Reflection.ParameterInfo[] pinfo, System.Globalization.CultureInfo culture, System.Reflection.BindingFlags invokeAttr) (at <d6232873609549b8a045fa15811a5bd3>:0)
System.Reflection.RuntimeConstructorInfo.DoInvoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at <d6232873609549b8a045fa15811a5bd3>:0)
System.Reflection.RuntimeConstructorInfo.Invoke (System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at <d6232873609549b8a045fa15811a5bd3>:0)
System.Reflection.ConstructorInfo.Invoke (System.Object[] parameters) (at <d6232873609549b8a045fa15811a5bd3>:0)
UnityEngine.Events.PersistentCall.GetObjectCall (UnityEngine.Object target, System.Reflection.MethodInfo method, UnityEngine.Events.ArgumentCache arguments) (at <685c48cf8f0b48abb797275c046dda6a>:0)
UnityEngine.Events.PersistentCall.GetRuntimeCall (UnityEngine.Events.UnityEventBase theEvent) (at <685c48cf8f0b48abb797275c046dda6a>:0)
UnityEngine.Events.PersistentCallGroup.Initialize (UnityEngine.Events.InvokableCallList invokableList, UnityEngine.Events.UnityEventBase unityEventBase) (at <685c48cf8f0b48abb797275c046dda6a>:0)
UnityEngine.Events.UnityEventBase.RebuildPersistentCallsIfNeeded () (at <685c48cf8f0b48abb797275c046dda6a>:0)
UnityEngine.Events.UnityEventBase.PrepareInvoke () (at <685c48cf8f0b48abb797275c046dda6a>:0)
UnityEngine.Events.UnityEvent`1[T0].Invoke (T0 arg0) (at <685c48cf8f0b48abb797275c046dda6a>:0)
UnityEngine.EventSystems.EventTrigger.Execute (UnityEngine.EventSystems.EventTriggerType id, UnityEngine.EventSystems.BaseEventData eventData) (at Library/PackageCache/com.unity.ugui@1.0.0/Runtime/EventSystem/EventTrigger.cs:220)
UnityEngine.EventSystems.EventTrigger.OnPointerUp (UnityEngine.EventSystems.PointerEventData eventData) (at Library/PackageCache/com.unity.ugui@1.0.0/Runtime/EventSystem/EventTrigger.cs:269)
UnityEngine.EventSystems.ExecuteEvents.Execute (UnityEngine.EventSystems.IPointerUpHandler handler, UnityEngine.EventSystems.BaseEventData eventData) (at Library/PackageCache/com.unity.ugui@1.0.0/Runtime/EventSystem/ExecuteEvents.cs:50)
UnityEngine.EventSystems.ExecuteEvents.Execute[T] (UnityEngine.GameObject target, UnityEngine.EventSystems.BaseEventData eventData, UnityEngine.EventSystems.ExecuteEvents+EventFunction`1[T1] functor) (at Library/PackageCache/com.unity.ugui@1.0.0/Runtime/EventSystem/ExecuteEvents.cs:272)
UnityEngine.EventSystems.EventSystem:Update() (at Library/PackageCache/com.unity.ugui@1.0.0/Runtime/EventSystem/EventSystem.cs:501)

Since i got this error, The Dialogue Manager is not working any longer.
Any solutions?

Thanks

[Albyd]

Managed to find a solution!