Error when selecting shader. Unity 5.6.0f3 SF: 1.36

NullReferenceException: Object reference not set to an instance of an object
UnityEditor.ShaderForgeInspector.ShowCompiledCodeButton (UnityEngine.Shader s) (at Assets/ShaderForge/Editor/InternalResources/Inspectors/ShaderForgeInspector.cs:334)
UnityEditor.ShaderForgeInspector.ShowShaderCodeArea (UnityEngine.Shader s) (at Assets/ShaderForge/Editor/InternalResources/Inspectors/ShaderForgeInspector.cs:294)
UnityEditor.ShaderForgeInspector.DrawUnitysInspector () (at Assets/ShaderForge/Editor/InternalResources/Inspectors/ShaderForgeInspector.cs:264)
UnityEditor.ShaderForgeInspector.OnInspectorGUI () (at Assets/ShaderForge/Editor/InternalResources/Inspectors/ShaderForgeInspector.cs:213)
UnityEditor.InspectorWindow.DrawEditor (UnityEditor.Editor editor, Int32 editorIndex, Boolean rebuildOptimizedGUIBlock, System.Boolean& showImportedObjectBarNext, UnityEngine.Rect& importedObjectBarRect) (at C:/buildslave/unity/build/Editor/Mono/Inspector/InspectorWindow.cs:1229)
UnityEditor.DockArea:OnGUI()