fix

admin/main/submenu/nullable_table/index.php

@@ -0,0 +1,20 @@
+<?php
+
+use Bx\Nullable\ORM\NullableTable;
+use Wt\Core\Admin\TableAdminPage;
+
+
+require_once($_SERVER['DOCUMENT_ROOT'].'/bitrix/modules/main/include/prolog_admin.php');
+
+/**
+ * @var NullableTable $ormTable
+ */
+$ormTable = resolve(NullableTable::class);
+
+$tableAdminPage = new TableAdminPage($ormTable, $_REQUEST, '/bitrix/admin/bx_nullable.main.nullable_table.row.php');
+$tableAdminPage
+    ->checkPermission()
+    ->start()
+    ->show();
+
+require($_SERVER['DOCUMENT_ROOT'].'/bitrix/modules/main/include/epilog_admin.php');