ProBuilder problem.

When I go to full screen in ProBuilder 2.x it gave me that error, can anyone fix this problem?
NullReferenceException: Object reference not set to an instance of an object ProBuilder2.Common.pb_ElementGraphics.OnDisable () (at <18af90a43fca47ddb60c356c71cec131>:0) UnityEngine.Object:set_hideFlags(HideFlags) ProBuilder2.Common.pb_ElementGraphics:Awake() UnityEngine.GameObject:AddComponent() ProBuilder2.Common.pb_MonoBehaviourSingleton`1:get_instance() ProBuilder2.EditorCommon.pb_Editor:get_graphics() ProBuilder2.EditorCommon.pb_Editor:OnEnable() UnityEditorInternal.InternalEditorUtility:LoadSerializedFileAndForget(String) UnityEditor.EditorApplication:Internal_CallGlobalEventHandler()

I am in Chapter 207 “ProBuilder to make Rooms” and nothing is working for me. I have imported ProGrids 2x from the store and i dont have the black-blue grid menu on top left. And i can’t build a house with the polyshape option. It don’t let me lay down the points. Does anyone have the same problem?
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