Возврат к основной форме (но есть ошибка при запуске...)

Pf2eViewer/MainViewForm.cs

@@ -1,4 +1,5 @@
-using Newtonsoft.Json;
+using System.Diagnostics.CodeAnalysis;
+using Newtonsoft.Json;
 using Newtonsoft.Json.Converters;
 using Newtonsoft.Json.Serialization;
 using Pf2eModel;
@@ -16,7 +17,8 @@ public partial class MainViewForm : Form
 
     public readonly string JsonViewerHtml;
 
-    public readonly EntityView Viewer;
+    [AllowNull]
+    public readonly EntityView Viewer = null;
 
     public MainViewForm()
     {
@@ -67,7 +69,8 @@ public partial class MainViewForm : Form
 
         string json = result[..^1] + $",\"SubEntity\":{subResult}}}";
 
-        RenderJson(json);
+        EntityTreeViewerControl.EntityView = newEntity;
+        // RenderJson(json);
 
         DescriptionTextBox.Text = newEntity.Entity!.Description;
     }
@@ -85,6 +88,7 @@ public partial class MainViewForm : Form
 
     public void RenderJson(string json)
     {
+        /*
         if (JsonWebView.CoreWebView2 == null)
         {
             JsonWebView.EnsureCoreWebView2Async();
@@ -93,14 +97,6 @@ public partial class MainViewForm : Form
 
         string html = JsonViewerHtml.Replace("{JSON}", json);
         JsonWebView.CoreWebView2.NavigateToString(html);
-    }
-
-    private void JsonWebView_CoreWebView2InitializationCompleted(
-        object sender,
-        Microsoft.Web.WebView2.Core.CoreWebView2InitializationCompletedEventArgs e
-    )
-    {
-        JsonWebView.Visible = true;
-        DatabaseViewer_EntityChange(DatabaseViewer.CurrentEntity);
+        */
     }
 }