Fix the flash messages

app/src/Middlewares.php

@@ -49,7 +49,6 @@ class Middlewares
         /** @var SessionInterface $session */
         $session = $container->get(SessionInterface::class);
         $twig->getEnvironment()->addGlobal('session', $session);
-        $twig->getEnvironment()->addGlobal('flash', $session->getFlash());
 
         $app->add(TwigMiddleware::create($app, $twig));
 

app/templates/layouts/components/flash.twig

@@ -1,5 +1,7 @@
-{% for level, message in flash.all() %}
+{% for level, messages in session.getFlash().all() %}
     <div class="flash {{ level }}" role="alert">
-        {{ message }}
+        {% for message in messages %}
+            <div>{{ message }}</div>
+        {% endfor %}
     </div>
 {% endfor %}