Fix last errors

src/Umbraco.Infrastructure/PropertyEditors/BlockEditorPropertyEditor.cs

@@ -36,7 +36,7 @@ namespace Umbraco.Cms.Core.PropertyEditors
 
         #region Value Editor
 
-        protected override IDataValueEditor CreateValueEditor() => DataValueEditorFactory.Create<BlockEditorPropertyValueEditor>(Attribute);
+        protected override IDataValueEditor CreateValueEditor() => DataValueEditorFactory.Create<BlockEditorPropertyValueEditor>(Attribute!);
 
         internal class BlockEditorPropertyValueEditor : DataValueEditor, IDataValueReference
         {

src/Umbraco.Infrastructure/PropertyEditors/CheckBoxListPropertyEditor.cs

@@ -42,6 +42,6 @@ namespace Umbraco.Cms.Core.PropertyEditors
         protected override IConfigurationEditor CreateConfigurationEditor() => new ValueListConfigurationEditor(_textService, _ioHelper);
 
         /// <inheritdoc />
-        protected override IDataValueEditor CreateValueEditor() => DataValueEditorFactory.Create<MultipleValueEditor>(Attribute);
+        protected override IDataValueEditor CreateValueEditor() => DataValueEditorFactory.Create<MultipleValueEditor>(Attribute!);
     }
 }

src/Umbraco.Infrastructure/PropertyEditors/ContentPickerPropertyEditor.cs

@@ -40,7 +40,7 @@ namespace Umbraco.Cms.Core.PropertyEditors
             return new ContentPickerConfigurationEditor(_ioHelper);
         }
 
-        protected override IDataValueEditor CreateValueEditor() => DataValueEditorFactory.Create<ContentPickerPropertyValueEditor>(Attribute);
+        protected override IDataValueEditor CreateValueEditor() => DataValueEditorFactory.Create<ContentPickerPropertyValueEditor>(Attribute!);
 
         internal class ContentPickerPropertyValueEditor  : DataValueEditor, IDataValueReference
         {

src/Umbraco.Infrastructure/PropertyEditors/DropDownFlexiblePropertyEditor.cs

@@ -33,7 +33,7 @@ namespace Umbraco.Cms.Core.PropertyEditors
 
         protected override IDataValueEditor CreateValueEditor()
         {
-            return DataValueEditorFactory.Create<MultipleValueEditor>(Attribute);
+            return DataValueEditorFactory.Create<MultipleValueEditor>(Attribute!);
         }
 
         protected override IConfigurationEditor CreateConfigurationEditor() => new DropDownFlexibleConfigurationEditor(_textService, _ioHelper);

src/Umbraco.Infrastructure/PropertyEditors/FileUploadPropertyEditor.cs

@@ -62,7 +62,7 @@ namespace Umbraco.Cms.Core.PropertyEditors
         /// <returns>The corresponding property value editor.</returns>
         protected override IDataValueEditor CreateValueEditor()
         {
-            var editor = DataValueEditorFactory.Create<FileUploadPropertyValueEditor>(Attribute);
+            var editor = DataValueEditorFactory.Create<FileUploadPropertyValueEditor>(Attribute!);
             editor.Validators.Add(new UploadFileTypeValidator(_localizedTextService, _contentSettings));
             return editor;
         }

src/Umbraco.Infrastructure/PropertyEditors/GridPropertyEditor.cs

@@ -62,7 +62,7 @@ namespace Umbraco.Cms.Core.PropertyEditors
         /// Overridden to ensure that the value is validated
         /// </summary>
         /// <returns></returns>
-        protected override IDataValueEditor CreateValueEditor() => DataValueEditorFactory.Create<GridPropertyValueEditor>(Attribute);
+        protected override IDataValueEditor CreateValueEditor() => DataValueEditorFactory.Create<GridPropertyValueEditor>(Attribute!);
 
         protected override IConfigurationEditor CreateConfigurationEditor() => new GridConfigurationEditor(_ioHelper);
 

src/Umbraco.Infrastructure/PropertyEditors/ImageCropperPropertyEditor.cs

@@ -86,7 +86,7 @@ namespace Umbraco.Cms.Core.PropertyEditors
         /// Creates the corresponding property value editor.
         /// </summary>
         /// <returns>The corresponding property value editor.</returns>
-        protected override IDataValueEditor CreateValueEditor() => DataValueEditorFactory.Create<ImageCropperPropertyValueEditor>(Attribute);
+        protected override IDataValueEditor CreateValueEditor() => DataValueEditorFactory.Create<ImageCropperPropertyValueEditor>(Attribute!);
 
         /// <summary>
         /// Creates the corresponding preValue editor.

src/Umbraco.Infrastructure/PropertyEditors/LabelPropertyEditor.cs

@@ -35,7 +35,7 @@ namespace Umbraco.Cms.Core.PropertyEditors
         }
 
         /// <inheritdoc />
-        protected override IDataValueEditor CreateValueEditor() =>  DataValueEditorFactory.Create<LabelPropertyValueEditor>(Attribute);
+        protected override IDataValueEditor CreateValueEditor() =>  DataValueEditorFactory.Create<LabelPropertyValueEditor>(Attribute!);
 
         /// <inheritdoc />
         protected override IConfigurationEditor CreateConfigurationEditor() => new LabelConfigurationEditor(_ioHelper);

src/Umbraco.Infrastructure/PropertyEditors/MediaPicker3PropertyEditor.cs

@@ -51,7 +51,7 @@ namespace Umbraco.Cms.Core.PropertyEditors
 
         /// <inheritdoc />
         protected override IDataValueEditor CreateValueEditor() =>
-            DataValueEditorFactory.Create<MediaPicker3PropertyValueEditor>(Attribute);
+            DataValueEditorFactory.Create<MediaPicker3PropertyValueEditor>(Attribute!);
 
         internal class MediaPicker3PropertyValueEditor : DataValueEditor, IDataValueReference
         {

src/Umbraco.Infrastructure/PropertyEditors/MediaPickerPropertyEditor.cs

@@ -46,7 +46,7 @@ namespace Umbraco.Cms.Core.PropertyEditors
         /// <inheritdoc />
         protected override IConfigurationEditor CreateConfigurationEditor() => new MediaPickerConfigurationEditor(_ioHelper);
 
-        protected override IDataValueEditor CreateValueEditor() => DataValueEditorFactory.Create<MediaPickerPropertyValueEditor>(Attribute);
+        protected override IDataValueEditor CreateValueEditor() => DataValueEditorFactory.Create<MediaPickerPropertyValueEditor>(Attribute!);
 
         public class MediaPickerPropertyValueEditor : DataValueEditor, IDataValueReference
         {

src/Umbraco.Infrastructure/PropertyEditors/MultiNodeTreePickerPropertyEditor.cs

@@ -34,7 +34,7 @@ namespace Umbraco.Cms.Core.PropertyEditors
 
         protected override IConfigurationEditor CreateConfigurationEditor() => new MultiNodePickerConfigurationEditor(_ioHelper);
 
-        protected override IDataValueEditor CreateValueEditor() => DataValueEditorFactory.Create<MultiNodeTreePickerPropertyValueEditor>(Attribute);
+        protected override IDataValueEditor CreateValueEditor() => DataValueEditorFactory.Create<MultiNodeTreePickerPropertyValueEditor>(Attribute!);
 
         public class MultiNodeTreePickerPropertyValueEditor : DataValueEditor, IDataValueReference
         {

src/Umbraco.Infrastructure/PropertyEditors/MultiUrlPickerPropertyEditor.cs

@@ -37,6 +37,6 @@ namespace Umbraco.Cms.Core.PropertyEditors
 
         protected override IConfigurationEditor CreateConfigurationEditor() => new MultiUrlPickerConfigurationEditor(_ioHelper);
 
-        protected override IDataValueEditor CreateValueEditor() => DataValueEditorFactory.Create<MultiUrlPickerValueEditor>(Attribute);
+        protected override IDataValueEditor CreateValueEditor() => DataValueEditorFactory.Create<MultiUrlPickerValueEditor>(Attribute!);
     }
 }

src/Umbraco.Infrastructure/PropertyEditors/MultipleTextStringPropertyEditor.cs

@@ -43,7 +43,7 @@ namespace Umbraco.Cms.Core.PropertyEditors
         }
 
         /// <inheritdoc />
-        protected override IDataValueEditor CreateValueEditor() => DataValueEditorFactory.Create<MultipleTextStringPropertyValueEditor>(Attribute);
+        protected override IDataValueEditor CreateValueEditor() => DataValueEditorFactory.Create<MultipleTextStringPropertyValueEditor>(Attribute!);
 
         /// <inheritdoc />
         protected override IConfigurationEditor CreateConfigurationEditor() => new MultipleTextStringConfigurationEditor(_ioHelper);

src/Umbraco.Infrastructure/PropertyEditors/NestedContentPropertyEditor.cs

@@ -53,7 +53,7 @@ namespace Umbraco.Cms.Core.PropertyEditors
         #region Value Editor
 
         protected override IDataValueEditor CreateValueEditor()
-            => DataValueEditorFactory.Create<NestedContentPropertyValueEditor>(Attribute);
+            => DataValueEditorFactory.Create<NestedContentPropertyValueEditor>(Attribute!);
 
         internal class NestedContentPropertyValueEditor : DataValueEditor, IDataValueReference
         {

src/Umbraco.Infrastructure/PropertyEditors/RichTextPropertyEditor.cs

@@ -66,7 +66,7 @@ namespace Umbraco.Cms.Core.PropertyEditors
         /// </summary>
         /// <returns></returns>
         protected override IDataValueEditor CreateValueEditor() =>
-            DataValueEditorFactory.Create<RichTextPropertyValueEditor>(Attribute);
+            DataValueEditorFactory.Create<RichTextPropertyValueEditor>(Attribute!);
 
         protected override IConfigurationEditor CreateConfigurationEditor() =>
             new RichTextConfigurationEditor(_ioHelper);

src/Umbraco.Infrastructure/PropertyEditors/TagsPropertyEditor.cs

@@ -46,7 +46,7 @@ namespace Umbraco.Cms.Core.PropertyEditors
         }
 
         protected override IDataValueEditor CreateValueEditor() =>
-            DataValueEditorFactory.Create<TagPropertyValueEditor>(Attribute);
+            DataValueEditorFactory.Create<TagPropertyValueEditor>(Attribute!);
 
         protected override IConfigurationEditor CreateConfigurationEditor() => new TagConfigurationEditor(_validators, _ioHelper, _localizedTextService);
 

src/Umbraco.Infrastructure/PropertyEditors/TextAreaPropertyEditor.cs

@@ -36,7 +36,7 @@ namespace Umbraco.Cms.Core.PropertyEditors
         }
 
         /// <inheritdoc />
-        protected override IDataValueEditor CreateValueEditor() => DataValueEditorFactory.Create<TextOnlyValueEditor>(Attribute);
+        protected override IDataValueEditor CreateValueEditor() => DataValueEditorFactory.Create<TextOnlyValueEditor>(Attribute!);
 
         /// <inheritdoc />
         protected override IConfigurationEditor CreateConfigurationEditor() => new TextAreaConfigurationEditor(_ioHelper);

src/Umbraco.Infrastructure/PropertyEditors/TextboxPropertyEditor.cs

@@ -36,7 +36,7 @@ namespace Umbraco.Cms.Core.PropertyEditors
 
         /// <inheritdoc/>
         protected override IDataValueEditor CreateValueEditor() =>
-            DataValueEditorFactory.Create<TextOnlyValueEditor>(Attribute);
+            DataValueEditorFactory.Create<TextOnlyValueEditor>(Attribute!);
 
         /// <inheritdoc/>
         protected override IConfigurationEditor CreateConfigurationEditor() => new TextboxConfigurationEditor(_ioHelper);