diff --git a/www/index.php b/www/index.php
index 6e6bf50ced64b0c787d300e6b1f81fc0f9f35a9e..3ad2db40981b6c6cf9705e577aff7f8c351e5f6b 100644
--- a/www/index.php
+++ b/www/index.php
@@ -42,6 +42,14 @@ $f3->set('ONERROR', function ($f3) {
     // If there is any problem, replace the current csrf
     $csrf = md5(rand());
     $f3->CSRF = $csrf;
+
+    // If neither error or message are set, define them
+    if (!$f3->exists('SESSION.message')) {
+        $f3->push('SESSION.message', '');
+    }
+    if (!$f3->exists('SESSION.error')) {
+        $f3->push('SESSION.error', '');
+    }
     $f3->get('container')['session']->set('csrf', $csrf);
 
     while (ob_get_level()) {