Cannot add component of type 'Collider' because it is abstract.

[Ouren]

Cannot add component of type 'Collider' because it is abstract. Add component of type that is derived from 'Collider' instead.
UnityEngine.GameObject:AddComponent(Type)
HutongGames.PlayMakerEditor.ActionEditor:EditField(FsmStateAction, FieldInfo)
HutongGames.PlayMakerEditor.ActionEditor:DrawDefaultInspector(FsmStateAction)
HutongGames.PlayMakerEditor.ActionEditor:OnGUI(FsmStateAction)
HutongGames.PlayMakerEditor.StateInspector:DoActionGUI(FsmStateAction)
HutongGames.PlayMakerEditor.StateInspector:DoActionsListGUI(FsmState)
HutongGames.PlayMakerEditor.StateInspector:DoActionsPanel()
HutongGames.PlayMakerEditor.StateInspector:OnGUI()
HutongGames.PlayMakerEditor.InspectorPanel:OnGUI(Rect)
HutongGames.PlayMakerEditor.FsmEditor:OnGUI()
FsmEditorWindow:DoGUI() (at Assets/PlayMaker/Editor/FsmEditorWindow.cs:94)
HutongGames.PlayMakerEditor.BaseEditorWindow:OnGUI()
UnityEditor.DockArea:OnGUI()