Fixing the issue with 401 error

app/controller/admin.php

@@ -70,6 +70,7 @@ class Admin extends Controller
             $success = $auth->basic('\Controller\Admin::hash_password');
             if (!$success) {
                 $f3->push('SESSION.error', 'Accès non autorisé');
+                $f3->push('SESSION.message', '');
                 $f3->error(401);
             } else {
                 $f3->set('SESSION.admin', true);