bug fix MaterioDecoupledLanguageLinks

web/modules/custom/materio_decoupled/src/Controller/MaterioDecoupledLanguageLinks.php

@@ -53,17 +53,17 @@ class MaterioDecoupledLanguageLinks extends ControllerBase {
     // build the links
     $url_object = \Drupal::service('path.validator')->getUrlIfValid($path);
 
-    $languages = $this->languageManager->getNativeLanguages();
     if (!$url_object) {
       // if path does not exists
       $data["error"] = "path {$path} is not valid";
       $route_name = "<front>";
-      $route_parameters = null;
+      $route_parameters = array();
     }else{
       $route_name = $url_object->getRouteName();
       $route_parameters = $url_object->getrouteParameters();
     }
-
+    
+    $languages = $this->languageManager->getNativeLanguages();
     foreach ($languages as $key => $language) {
       $url = Url::fromRoute($route_name, $route_parameters, ["language"=>$language]);
       $links[$key] = [