Help solve the problem, after updating Unity when selecting any object of Spine2D, here comes this error https://pastebin.com/FThuMEFW
Unity 5.6.f21
Last installed spine-unity-3_6-2017-06-26 Compatible with Spine 3.6.x and Unity 5.6-2017.1
NullReferenceException: Object reference not set to an instance of an object
UnityEditor.PropertyHandler.OnGUILayout (UnityEditor.SerializedProperty property, UnityEngine.GUIContent label, Boolean includeChildren, UnityEngine.GUILayoutOption[] options) (at /Users/builduser/buildslave/unity/build/Editor/Mono/ScriptAttributeGUI/PropertyHandler.cs:198)
UnityEditor.EditorGUILayout.PropertyField (UnityEditor.SerializedProperty property, UnityEngine.GUIContent label, Boolean includeChildren, UnityEngine.GUILayoutOption[] options) (at /Users/builduser/buildslave/unity/build/Editor/Mono/EditorGUI.cs:7569)
UnityEditor.EditorGUILayout.PropertyField (UnityEditor.SerializedProperty property, Boolean includeChildren, UnityEngine.GUILayoutOption[] options) (at /Users/builduser/buildslave/unity/build/Editor/Mono/EditorGUI.cs:7563)
Spine.Unity.Editor.SkeletonAnimatorInspector.DrawInspectorGUI (Boolean multi) (at Assets/Spine/spine-unity/Editor/SkeletonAnimatorInspector.cs:48)
Spine.Unity.Editor.SkeletonRendererInspector.OnInspectorGUI () (at Assets/Spine/spine-unity/Editor/SkeletonRendererInspector.cs:385)
UnityEditor.InspectorWindow.DrawEditor (UnityEditor.Editor editor, Int32 editorIndex, Boolean rebuildOptimizedGUIBlock, System.Boolean& showImportedObjectBarNext, UnityEngine.Rect& importedObjectBarRect) (at /Users/builduser/buildslave/unity/build/Editor/Mono/Inspector/InspectorWindow.cs:1229)
UnityEditor.DockArea:OnGUI()