diff --git a/.gitignore b/.gitignore
index ea8d6aa9..43469c37 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,7 +7,6 @@
 /dev.php
 /install.php
 /clear_cache.php
-/pimple.json
 /assets
 project_env.sh
 
diff --git a/composer.json b/composer.json
index d80eb6b9..72c54569 100644
--- a/composer.json
+++ b/composer.json
@@ -37,7 +37,6 @@
         "guzzlehttp/guzzle": "^7.2.0",
         "jms/serializer": "^3.9.0",
         "league/flysystem": "^3.0",
-        "pimple/pimple": "^3.3.1",
         "ramsey/uuid": "^4.7",
         "roadiz/compat-bundle": "2.3.x-dev",
         "roadiz/core-bundle": "2.3.x-dev",
diff --git a/src/Controllers/Nodes/NodesAttributesController.php b/src/Controllers/Nodes/NodesAttributesController.php
index d11e3ecd..5df37df3 100644
--- a/src/Controllers/Nodes/NodesAttributesController.php
+++ b/src/Controllers/Nodes/NodesAttributesController.php
@@ -14,6 +14,7 @@
 use RZ\Roadiz\CoreBundle\Event\NodesSources\NodesSourcesUpdatedEvent;
 use RZ\Roadiz\CoreBundle\Form\AttributeValueTranslationType;
 use RZ\Roadiz\CoreBundle\Form\AttributeValueType;
+use RZ\Roadiz\CoreBundle\Form\Error\FormErrorSerializer;
 use RZ\Roadiz\CoreBundle\Security\Authorization\Voter\NodeVoter;
 use Symfony\Component\Form\Extension\Core\Type\FormType;
 use Symfony\Component\Form\FormFactoryInterface;
@@ -26,8 +27,10 @@
 
 class NodesAttributesController extends RozierApp
 {
-    public function __construct(private readonly FormFactoryInterface $formFactory)
-    {
+    public function __construct(
+        private readonly FormFactoryInterface $formFactory,
+        private readonly FormErrorSerializer $formErrorSerializer
+    ) {
     }
 
     /**
@@ -126,7 +129,7 @@ public function editAction(Request $request, int $nodeId, int $translationId): R
                         'translationId' => $translation->getId(),
                     ]);
                 } else {
-                    $errors = $this->getErrorsAsArray($attributeValueTranslationForm);
+                    $errors = $this->formErrorSerializer->getErrorsAsArray($attributeValueTranslationForm);
                     /*
                      * Handle errors when Ajax POST requests
                      */
diff --git a/src/Controllers/Tags/TagsController.php b/src/Controllers/Tags/TagsController.php
index f5fd8a81..9a766e71 100644
--- a/src/Controllers/Tags/TagsController.php
+++ b/src/Controllers/Tags/TagsController.php
@@ -15,6 +15,7 @@
 use RZ\Roadiz\CoreBundle\Event\Tag\TagDeletedEvent;
 use RZ\Roadiz\CoreBundle\Event\Tag\TagUpdatedEvent;
 use RZ\Roadiz\CoreBundle\Exception\EntityAlreadyExistsException;
+use RZ\Roadiz\CoreBundle\Form\Error\FormErrorSerializer;
 use RZ\Roadiz\CoreBundle\Repository\TranslationRepository;
 use RZ\Roadiz\Utils\StringHandler;
 use Symfony\Component\Form\Extension\Core\Type\HiddenType;
@@ -41,6 +42,7 @@ class TagsController extends RozierApp
 
     public function __construct(
         private readonly FormFactoryInterface $formFactory,
+        private readonly FormErrorSerializer $formErrorSerializer,
         private readonly HandlerFactoryInterface $handlerFactory,
         private readonly TreeWidgetFactory $treeWidgetFactory
     ) {
@@ -202,7 +204,7 @@ public function editTranslatedAction(Request $request, int $tagId, ?int $transla
              * Handle errors when Ajax POST requests
              */
             if ($isJsonRequest) {
-                $errors = $this->getErrorsAsArray($form);
+                $errors = $this->formErrorSerializer->getErrorsAsArray($form);
                 return new JsonResponse([
                     'status' => 'fail',
                     'errors' => $errors,
@@ -397,7 +399,7 @@ public function editSettingsAction(Request $request, int $tagId): Response
              * Handle errors when Ajax POST requests
              */
             if ($isJsonRequest) {
-                $errors = $this->getErrorsAsArray($form);
+                $errors = $this->formErrorSerializer->getErrorsAsArray($form);
                 return new JsonResponse([
                     'status' => 'fail',
                     'errors' => $errors,
diff --git a/src/RozierApp.php b/src/RozierApp.php
index b1b395a7..412b116e 100644
--- a/src/RozierApp.php
+++ b/src/RozierApp.php
@@ -103,10 +103,7 @@ protected function getNamespacedView(string $view, string $namespace = ''): stri
         return $view;
     }
 
-    /**
-     * @return $this
-     */
-    public function prepareBaseAssignation()
+    public function prepareBaseAssignation(): static
     {
         parent::prepareBaseAssignation();
         /*