ArgumentNullException: Value cannot be null.
Parameter name: shader
UnityEngine.Material..ctor (UnityEngine.Shader shader) (at /Users/bokken/buildslave/unity/build/Runtime/Export/Shaders/Material.bindings.cs:18)
Spine.Unity.Editor.AssetUtility.IngestSpineAtlas (UnityEngine.TextAsset atlasText, System.Collections.Generic.List1[T] texturesWithoutMetaFile) (at Assets/Git/Spine/Editor/spine-unity/Editor/Utility/AssetUtility.cs:581)
Spine.Unity.Editor.AssetUtility.ImportSpineContent (System.String[] imported, System.Collections.Generic.List
1[T] texturesWithoutMetaFile, System.Boolean reimport) (at Assets/Git/Spine/Editor/spine-unity/Editor/Utility/AssetUtility.cs:329)
Spine.Unity.Editor.AssetUtility.HandleOnPostprocessAllAssets (System.String[] imported, System.Collections.Generic.List`1[T] texturesWithoutMetaFile) (at Assets/Git/Spine/Editor/spine-unity/Editor/Utility/AssetUtility.cs:113)
Spine.Unity.Editor.SpineEditorUtilities.OnPostprocessAllAssets (System.String[] imported, System.String[] deleted, System.String[] moved, System.String[] movedFromAssetPaths) (at Assets/Git/Spine/Editor/spine-unity/Editor/Utility/SpineEditorUtilities.cs:98)
System.Reflection.RuntimeMethodInfo.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at <e38a6d3ee47c43eb9b2e49c63fc0aa48>:0)
Rethrow as TargetInvocationException: Exception has been thrown by the target of an invocation.
System.Reflection.RuntimeMethodInfo.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at <e38a6d3ee47c43eb9b2e49c63fc0aa48>:0)
System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) (at <e38a6d3ee47c43eb9b2e49c63fc0aa48>:0)
UnityEditor.AssetPostprocessingInternal.InvokeMethod (System.Reflection.MethodInfo method, System.Object[] args) (at /Users/bokken/buildslave/unity/build/Editor/Mono/AssetPostprocessor.cs:1145)
UnityEditor.AssetPostprocessingInternal.PostprocessAllAssets (System.String[] importedAssets, System.String[] addedAssets, System.String[] deletedAssets, System.String[] movedAssets, System.String[] movedFromPathAssets, System.Boolean didDomainReload) (at /Users/bokken/buildslave/unity/build/Editor/Mono/AssetPostprocessor.cs:385)