diff --git a/src/Controller/UserController.php b/src/Controller/UserController.php
index 0dadb33..d2bf263 100644
--- a/src/Controller/UserController.php
+++ b/src/Controller/UserController.php
@@ -38,6 +38,9 @@ class UserController extends AbstractController
         if ($this->isGranted('ROLE_SUDALYS_ADMIN')) {
             $userId = $request->attributes->get('id');
             $user = $entityManager->getRepository(User::class)->find($userId);
+            if(!$user) {
+                throw $this->createNotFoundException('User not found');
+            }
             $userOrganizations = $this->userOrganizationService->getUserOrganizations($user);
         }
         return $this->render('user/profile.html.twig', [
diff --git a/templates/bundles/TwigBundle/Exception/error404.html.twig b/templates/bundles/TwigBundle/Exception/error404.html.twig
new file mode 100644
index 0000000..7597d0e
--- /dev/null
+++ b/templates/bundles/TwigBundle/Exception/error404.html.twig
@@ -0,0 +1,11 @@
+{% extends 'base.html.twig' %}
+
+{% block title %}Page Not Found (404){% endblock %}
+
+{% block body %}
+    <div class="d-flex justify-content-center align-items-center vh-100">
+        <h1>Oops! La page n'existe pas (404)</h1>
+        <p>La page que vous cherchez n'existe pas.</p>
+        <a href="{{ path('app_index') }}"> Retour à l'accueil </a>
+    </div>
+{% endblock %}
\ No newline at end of file