diff --git a/app/Http/Controllers/SetupController.php b/app/Http/Controllers/SetupController.php
index <HASH>..<HASH> 100644
--- a/app/Http/Controllers/SetupController.php
+++ b/app/Http/Controllers/SetupController.php
@@ -256,7 +256,7 @@ class SetupController extends AbstractBaseController
     private function checkLanguage(Request $request): bool
     {
         try {
-            I18N::init($request->get('lang'));
+            I18N::init($request->get('lang', ''));
         } catch (Exception $ex) {
             DebugBar::addThrowable($ex);
Fatal error: Uncaught TypeError: Argument 1 passed I<I>N::init() must be of the type string, ... (#<I>)

null given, called in \app\Http\Controllers\SetupController.php on line <I>