Custom inspector for List does not work

Hi, I have following objects:

Code (CSharp):

1. [IncludeInSettings(true)]
2. [Inspectable]
3. public classTrialImage
4. {
5.     [Inspectable]
6.     public Sprite asset;
7.     [Inspectable]
8.     public bool interact;
9. }
10.  
11. [IncludeInSettings(true)]
12. [Inspectable]
13. public class TrialImageGroup
14. {
15.     [Inspectable]
16.     public int imageCount;
17.     [Inspectable]
18.     public List<TrialImage> images;
19. }

And I have a following property drawer

Code (CSharp):

1. using UnityEditor;
2. using UnityEngine;
3.  
4. [CustomPropertyDrawer(typeof(TrialImage))]
5. public class TrialImageDrawer : PropertyDrawer
6. {
7.     public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
8.     {
9.      
10.        EditorGUI.BeginProperty(position, label, property);
11.        Rect newPosition = new Rect(position.x, position.y, position.width, position.height);
12.  
13.        SerializedProperty item = property.FindPropertyRelative("sprite");
14.        EditorGUI.PropertyField(newPosition, item, new GUIContent("sprite"));
15.  
16.        EditorGUI.EndProperty();
17.     }
18. }

I generate custom property drawers, but I receieve a following error:

Code (CSharp):

1. InvalidOperationException: Failed to find property 'PropertyProvider_TrialImage.item'.
2. Ludiq.SerializedPropertyUtility.FindPropertyOrFail (UnityEditor.SerializedObject serializedObject, System.String path) (at Ludiq.Core.Editor/SerializedProperties/SerializedPropertyUtility.cs:120)
3. Ludiq.SerializedPropertyUtility.CreateTemporaryProperty (System.Type type) (at Ludiq.Core.Editor/SerializedProperties/SerializedPropertyUtility.cs:73)
4. Ludiq.CustomPropertyDrawerInspector.Initialize () (at Ludiq.Core.Editor/Inspection/Special/CustomPropertyDrawerInspector.cs:15)
5. Ludiq.InspectorProvider.CreateDecorator (System.Type decoratorType, Ludiq.Metadata metadata) (at Ludiq.Core.Editor/Inspection/InspectorProvider.cs:19)
6. Ludiq.SingleDecoratorProvider`3[TDecorated,TDecorator,TAttribute].CreateDecorator (TDecorated decorated) (at Ludiq.Core.Editor/Decorators/SingleDecoratorProvider.cs:42)
7. Ludiq.SingleDecoratorProvider`3[TDecorated,TDecorator,TAttribute].GetDecorator (TDecorated decorated) (at Ludiq.Core.Editor/Decorators/SingleDecoratorProvider.cs:253)
8. Ludiq.XInspectorProvider.Inspector (Ludiq.Metadata metadata) (at Ludiq.Core.Editor/Inspection/InspectorProvider.cs:174)
9. Ludiq.LudiqGUI.GetInspectorHeight (Ludiq.Inspector parentInspector, Ludiq.Metadata metadata, System.Single width, UnityEngine.GUIContent label) (at Ludiq.Core.Editor/Interface/LudiqGUI.cs:76)
10. Ludiq.MetadataListAdaptor.GetItemHeight (System.Single width, System.Int32 index) (at Ludiq.Core.Editor/Inspection/MetadataListAdaptor.cs:229)
11. Ludiq.MetadataCollectionAdaptor.GetItemHeight (System.Int32 index) (at Ludiq.Core.Editor/Inspection/MetadataCollectionAdaptor.cs:105)
12. Ludiq.ReorderableList.ReorderableListControl.CalculateListHeight (Ludiq.ReorderableList.IReorderableListAdaptor adaptor) (at Ludiq.Core.Editor/Dependencies/ReorderableList/ReorderableListControl.cs:2118)
13. Ludiq.MetadataCollectionAdaptor.GetHeight (System.Single width, UnityEngine.GUIContent label) (at Ludiq.Core.Editor/Inspection/MetadataCollectionAdaptor.cs:148)
14. Ludiq.ListInspector.GetHeight (System.Single width, UnityEngine.GUIContent label) (at Ludiq.Core.Editor/Inspection/Special/ListInspector.cs:16)
15. Ludiq.Inspector.GetCachedHeight (System.Single width, UnityEngine.GUIContent label, Ludiq.Inspector parentInspector) (at Ludiq.Core.Editor/Inspection/Inspector.cs:192)

Any idea where this erro is coming from?