diff --git a/includes/YesWikiLoader.php b/includes/YesWikiLoader.php
index e540c303c..7f78b1366 100644
--- a/includes/YesWikiLoader.php
+++ b/includes/YesWikiLoader.php
@@ -13,6 +13,7 @@
 namespace YesWiki\Core;
 
 use Doctrine\Common\Annotations\AnnotationRegistry;
+use Exception;
 use Throwable;
 use YesWiki\Wiki;
 
@@ -33,13 +34,12 @@ public static function getWiki(bool $test = false): Wiki
         if (is_null(self::$wiki)) {
             require_once 'includes/autoload.inc.php';
             try {
-                $loader = require_once 'vendor/autoload.php';
-            } catch (Throwable $th) {
-                $message = "";
                 if (!file_exists('vendor/autoload.php')) {
-                    $message .= "ERROR ! : Folder `vendor/` seems not to be entirely copied ! (Maybe a YesWiki update aborted before its end !)<br/><strong>Could you manually copy the folder `vendor/` on your server by ftp ?</strong><br/>";
+                    throw new Exception("ERROR ! : Folder `vendor/` seems not to be entirely copied ! (Maybe a YesWiki update aborted before its end !)<br/><strong>Could you manually copy the folder `vendor/` on your server by ftp ?</strong><br/>");
                 }
-                $message .= $th->getMessage();
+                $loader = require_once 'vendor/autoload.php';
+            } catch (Throwable $th) {
+                $message = $th->getMessage();
                 // echo message directly because TemplateEngine not ready here
                 echo "<div style=\"border:1px red solid;background-color: #FFCCCC;margin:3px;padding:5px;border-radius:5px;\">$message</div>";
                 exit();