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_agenda/includes/edlp_agenda.inc

@@ -0,0 +1,71 @@
+<?php
+
+// use Drupal\Core\Url;
+
+function template_preprocess_edlp_agenda(&$vars){
+  // dpm($vars);
+  /*
+  @see https://www.drupal8.ovh/index.php/en/tutoriels/339/render-a-node-or-an-entity
+  */
+  $view_builder = \Drupal::entityTypeManager()->getViewBuilder('node');
+
+  // if(isset($vars['next_event_node'])){
+  //   $vars['next_event'] = array(
+  //     "#markup"=>"<h3>Prochaine Date</h3>",
+  //     "event"=>$view_builder->view($vars['next_event_node'], 'default')
+  //   );
+  // }
+
+  if(count($vars['coming_events_nodes'])){
+    $future_list = array (
+      '#theme' => 'item_list',
+      '#items' => [],
+    );
+    foreach($vars['coming_events_nodes'] as $node){
+      $future_list['#items'][] = $view_builder->view($node, 'teaser');
+    }
+
+    $vars['coming_events'] = array(
+      "#type"=>"container",
+      "#attributes"=>array(
+        "class"=>['future-events']
+      ),
+      "#markup"=>"<h3>".t("Upcoming Events")."</h3>",
+      "future_events"=>$future_list
+    );
+  }
+
+
+  $past_list = array (
+    '#theme' => 'item_list',
+    '#items' => [],
+  );
+  foreach($vars['past_events_nodes'] as $node){
+    $past_list['#items'][] = $view_builder->view($node, 'teaser');
+  }
+
+  $vars['past_events'] = array(
+    "#type"=>"container",
+    "#attributes"=>array(
+      "class"=>['past-events']
+    ),
+    "#markup"=>"<h3>".t("Past Events")."</h3>",
+    "past_events"=>$past_list
+  );
+
+  // return array(
+  //   "#type" => "container",
+  //   "#attributes"=>array(
+  //     "id"=>['agenda']
+  //   ),
+  //   "future_past"=>array(
+  //     "#type"=>"container",
+  //     "#attributes"=>array(
+  //       "class"=>['future-past-events', 'column', 'os-scroll']
+  //     ),
+  //     "future"=>,
+  //     "past"=>
+  //   )
+  // );
+
+}