I cannot modify Material property in the Animator, I get this error, none of the materials are modifiable in Animator, and in the pass I was able to, my version is 5.2.1 the last one
NullReferenceException: Object reference not set to an instance of an object
UnityEditorInternal.AnimationRecording.HasAnyRecordableModifications (UnityEngine.GameObject root, UnityEditor.UndoPropertyModification[ ] modifications) (at C:/buildslave/unity/build/Editor/Mono/Animation/AnimationWindow/AnimationRecording.cs:16)
UnityEditorInternal.AnimationRecording.Process (UnityEditorInternal.AnimationWindowState state, UnityEditor.UndoPropertyModification[ ] modifications) (at C:/buildslave/unity/build/Editor/Mono/Animation/AnimationWindow/AnimationRecording.cs:49)
UnityEditorInternal.AnimationWindowState.PostprocessAnimationRecordingModifications (UnityEditor.UndoPropertyModification[ ] modifications) (at C:/buildslave/unity/build/Editor/Mono/Animation/AnimationWindow/AnimationWindowState.cs:1255)
UnityEditorInternal.MaterialAnimationUtility.ApplyMaterialModificationToAnimationRecording (UnityEditor.MaterialProperty materialProp, UnityEngine.Object target, Single value) (at C:/buildslave/unity/build/Editor/Mono/Animation/MaterialAnimationUtility.cs:34)
UnityEditorInternal.MaterialAnimationUtility.ApplyMaterialModificationToAnimationRecording (UnityEditor.MaterialProperty materialProp, Int32 changedMask, UnityEngine.Renderer target, System.Object oldValue) (at C:/buildslave/unity/build/Editor/Mono/Animation/MaterialAnimationUtility.cs:93)
UnityEditor.MaterialEditor+ForwardApplyMaterialModification.DidModifyAnimationModeMaterialProperty (UnityEditor.MaterialProperty property, Int32 changedMask, System.Object previousValue) (at C:/buildslave/unity/build/Editor/Mono/Inspector/MaterialEditor.cs:1083)