some fix

app/themes/custom/controllers/MainController.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace app\themes\custom\controllers;
+
+use kernel\Controller;
+
+class MainController extends Controller
+{
+
+    protected function init(): void
+    {
+        parent::init();
+        $this->cgView->viewPath = APP_DIR . "/themes/custom/views/main/";
+        $this->cgView->layout = "main.php";
+        $this->cgView->layoutPath = APP_DIR . "/themes/custom/views/layout/";
+        $this->cgView->addVarToLayout("resources", "/resources/themes/custom");
+    }
+
+    public function actionIndex(): void
+    {
+        $this->cgView->render("index.php");
+    }
+
+    public function actionAbout(): void
+    {
+        $this->cgView->render("about.php");
+    }
+}