reinstalled all contribs with composer

need to run :
drush ev 'drupal_flush_all_caches();'
drush cr
and restart nginx and php-fpm before loading the website

web/modules/custom/edlp_fils/src/Controller/FilsController.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace Drupal\edlp_fils\Controller;
+
+use Drupal\Core\Controller\ControllerBase;
+// use Drupal\Core\Datetime\DrupalDateTime;
+use Symfony\Component\HttpFoundation\JsonResponse;
+
+
+class FilsController extends ControllerBase {
+
+  /**
+   * Display productions as a page.
+   *
+   * @return renderable array
+   */
+  public function fils() {
+    return array(
+      "#markup"=>"Edlp Fils"
+    );
+  }
+
+  /**
+   * Get agenda data as json through ajax.
+   *
+   * @return json
+   */
+  public function filsjson() {
+
+    $response = new JsonResponse();
+    $renderable = array(
+      "#markup"=>"Edlp Fils"
+    );
+    $rendered = render($renderable);
+
+    $response->setData([
+      'test'=>'hello',
+      'rendered'=> $rendered
+    ]);
+
+    return $response;
+  }
+
+}