diff --git a/qodana.yaml b/qodana.yaml
index 89a9f4fdd..8e42461fc 100644
--- a/qodana.yaml
+++ b/qodana.yaml
@@ -15,6 +15,7 @@ exclude:
       - translations
       - .php_cs.dist
       - doc
+      - templates
       - .github
       - .php-cs-fixer.dist.php
       - .qodana-profile.xml
diff --git a/src/Attributes/Response/Content/OneOfAssetJson.php b/src/Attributes/Response/Content/OneOfAssetJson.php
index e329ac72a..afaa0b80c 100644
--- a/src/Attributes/Response/Content/OneOfAssetJson.php
+++ b/src/Attributes/Response/Content/OneOfAssetJson.php
@@ -31,7 +31,7 @@ public function __construct()
             type: 'object',
             oneOf: array_map(static function ($class) {
                 return new Schema(ref: $class);
-            }, Schemas::Assets),
+            }, Schemas::ASSETS),
         );
     }
 }
diff --git a/src/Attributes/Response/Error/BadRequestResponse.php b/src/Attributes/Response/Error/BadRequestResponse.php
index b87344006..6140f9f25 100644
--- a/src/Attributes/Response/Error/BadRequestResponse.php
+++ b/src/Attributes/Response/Error/BadRequestResponse.php
@@ -33,7 +33,7 @@ public function __construct()
             content: new JsonContent(
                 oneOf: array_map(static function ($class) {
                     return new Schema(ref: $class);
-                }, Schemas::Errors),
+                }, Schemas::ERRORS),
             )
         );
     }
diff --git a/src/Attributes/Response/Error/MethodNotAllowedResponse.php b/src/Attributes/Response/Error/MethodNotAllowedResponse.php
index 4c7bd9c50..943828f99 100644
--- a/src/Attributes/Response/Error/MethodNotAllowedResponse.php
+++ b/src/Attributes/Response/Error/MethodNotAllowedResponse.php
@@ -33,7 +33,7 @@ public function __construct()
             content: new JsonContent(
                 oneOf: array_map(static function ($class) {
                     return new Schema(ref: $class);
-                }, Schemas::Errors),
+                }, Schemas::ERRORS),
             )
         );
     }
diff --git a/src/Attributes/Response/Error/UnauthorizedResponse.php b/src/Attributes/Response/Error/UnauthorizedResponse.php
index 8d85c42b7..dd25c2f46 100644
--- a/src/Attributes/Response/Error/UnauthorizedResponse.php
+++ b/src/Attributes/Response/Error/UnauthorizedResponse.php
@@ -33,7 +33,7 @@ public function __construct()
             content: new JsonContent(
                 oneOf: array_map(static function ($class) {
                     return new Schema(ref: $class);
-                }, Schemas::Errors),
+                }, Schemas::ERRORS),
             )
         );
     }
diff --git a/src/Attributes/Response/Error/UnsupportedMediaTypeResponse.php b/src/Attributes/Response/Error/UnsupportedMediaTypeResponse.php
index 27707479d..e96fd4d38 100644
--- a/src/Attributes/Response/Error/UnsupportedMediaTypeResponse.php
+++ b/src/Attributes/Response/Error/UnsupportedMediaTypeResponse.php
@@ -33,7 +33,7 @@ public function __construct()
             content: new JsonContent(
                 oneOf: array_map(static function ($class) {
                     return new Schema(ref: $class);
-                }, Schemas::Errors),
+                }, Schemas::ERRORS),
             )
         );
     }
diff --git a/src/Attributes/Response/Property/AnyOfAsset.php b/src/Attributes/Response/Property/AnyOfAsset.php
index 565962ed3..577fb6871 100644
--- a/src/Attributes/Response/Property/AnyOfAsset.php
+++ b/src/Attributes/Response/Property/AnyOfAsset.php
@@ -35,7 +35,7 @@ public function __construct()
             items: new Items(
                 anyOf: array_map(static function ($class) {
                     return new Schema(ref: $class);
-                }, Schemas::Assets)
+                }, Schemas::ASSETS)
             )
         );
     }
diff --git a/src/Config/Tags.php b/src/Config/Tags.php
index fd5f3915c..62c6c5add 100644
--- a/src/Config/Tags.php
+++ b/src/Config/Tags.php
@@ -21,10 +21,22 @@
 /**
  * @internal
  */
-#[Tag(name: Tags::Assets->name, description: 'Asset operations to get/update/create/delete assets')]
-#[Tag(name: Tags::Authorization->name, description: 'Login via username and password to get a token or refresh the token')]
-#[Tag(name: Tags::DataObjects->name, description: 'DataObject operations to get/update/create/delete data objects')]
-#[Tag(name: Tags::Translation->name, description: 'Get translations either for a single key or multiple keys')]
+#[Tag(
+    name: Tags::Assets->name,
+    description: 'Asset operations to get/update/create/delete assets'
+)]
+#[Tag(
+    name: Tags::Authorization->name,
+    description: 'Login via username and password to get a token or refresh the token'
+)]
+#[Tag(
+    name: Tags::DataObjects->name,
+    description: 'DataObject operations to get/update/create/delete data objects'
+)]
+#[Tag(
+    name: Tags::Translation->name,
+    description: 'Get translations either for a single key or multiple keys'
+)]
 enum Tags
 {
     case Assets;
diff --git a/src/Controller/Api/TranslationController.php b/src/Controller/Api/TranslationController.php
index 920702ae1..0cbf60c5d 100644
--- a/src/Controller/Api/TranslationController.php
+++ b/src/Controller/Api/TranslationController.php
@@ -37,7 +37,7 @@
  */
 final class TranslationController extends AbstractApiController
 {
-    private const PATH = '/translations';
+    private const ROUTE = '/translations';
 
     public function __construct(
         SerializerInterface $serializer,
@@ -46,10 +46,10 @@ public function __construct(
         parent::__construct($serializer);
     }
 
-    #[Route(self::PATH, name: 'pimcore_studio_api_translations', methods: ['POST'])]
+    #[Route(self::ROUTE, name: 'pimcore_studio_api_translations', methods: ['POST'])]
     //#[IsGranted(self::VOTER_PUBLIC_STUDIO_API, 'translation')]
     #[POST(
-        path: self::API_PATH . self::PATH,
+        path: self::API_PATH . self::ROUTE,
         operationId: 'getTranslations',
         description: 'Get translations for given keys and locale',
         summary: 'Get translations',
diff --git a/src/EventSubscriber/CorsSubscriber.php b/src/EventSubscriber/CorsSubscriber.php
index bc27b5338..c24b0d7fa 100644
--- a/src/EventSubscriber/CorsSubscriber.php
+++ b/src/EventSubscriber/CorsSubscriber.php
@@ -62,7 +62,7 @@ public function onKernelRequest(RequestEvent $event): void
         }
 
         // perform preflight checks
-        if ('OPTIONS' === $request->getMethod()) {
+        if ($request->getMethod() === 'OPTIONS') {
             $response = new Response();
 
             $response->headers->set('Access-Control-Allow-Credentials', 'true');
diff --git a/src/Exception/ClassDefinitionNotFoundException.php b/src/Exception/ClassDefinitionNotFoundException.php
new file mode 100644
index 000000000..aabf081a3
--- /dev/null
+++ b/src/Exception/ClassDefinitionNotFoundException.php
@@ -0,0 +1,24 @@
+<?php
+declare(strict_types=1);
+
+/**
+ * Pimcore
+ *
+ * This source file is available under two different licenses:
+ * - GNU General Public License version 3 (GPLv3)
+ * - Pimcore Commercial License (PCL)
+ * Full copyright and license information is available in
+ * LICENSE.md which is distributed with this source code.
+ *
+ *  @copyright  Copyright (c) Pimcore GmbH (http://www.pimcore.org)
+ *  @license    http://www.pimcore.org/license     GPLv3 and PCL
+ */
+
+namespace Pimcore\Bundle\StudioApiBundle\Exception;
+
+/**
+ * @internal
+ */
+final class ClassDefinitionNotFoundException extends AbstractApiException
+{
+}
diff --git a/src/Filter/DataObject/ClassNameFilter.php b/src/Filter/DataObject/ClassNameFilter.php
index 63408e725..0b53a279a 100644
--- a/src/Filter/DataObject/ClassNameFilter.php
+++ b/src/Filter/DataObject/ClassNameFilter.php
@@ -16,6 +16,7 @@
 
 namespace Pimcore\Bundle\StudioApiBundle\Filter\DataObject;
 
+use Exception;
 use Pimcore\Bundle\StudioApiBundle\Filter\FilterInterface;
 use Pimcore\Bundle\StudioApiBundle\Request\Query\Filter\DataObjectParametersInterface;
 use Pimcore\Bundle\StudioApiBundle\Request\Query\Filter\ParametersInterface;
@@ -27,6 +28,9 @@
  */
 final class ClassNameFilter implements FilterInterface
 {
+    /**
+     * @throws Exception
+     */
     public function apply(ParametersInterface $parameters, QueryInterface $query): QueryInterface
     {
         if(
diff --git a/src/Installer.php b/src/Installer.php
index 422808377..bc979b98c 100644
--- a/src/Installer.php
+++ b/src/Installer.php
@@ -52,6 +52,9 @@ public function install(): void
         parent::install();
     }
 
+    /**
+     * @throws SchemaException
+     */
     private function createTranslationTable(Schema $schema): void
     {
         $translationsDomainTableName = 'translations_' . TranslatorService::DOMAIN;
diff --git a/src/Response/Asset/Document.php b/src/Response/Asset/Document.php
index d61330927..60b13b481 100644
--- a/src/Response/Asset/Document.php
+++ b/src/Response/Asset/Document.php
@@ -31,7 +31,11 @@ class Document extends Asset
     public function __construct(
         #[Property(description: 'Page count', type: 'integer', example: 2)]
         private readonly ?int $pageCount,
-        #[Property(description: 'Path to image thumbnail', type: 'integer', example: '/path/to/document/imagethumbnail.jpg')]
+        #[Property(
+            description: 'Path to image thumbnail',
+            type: 'integer',
+            example: '/path/to/document/imagethumbnail.jpg'
+        )]
         private readonly ?string $imageThumbnailPath,
         string $iconName,
         bool $hasChildren,
diff --git a/src/Response/Asset/Video.php b/src/Response/Asset/Video.php
index f9ec81baf..f34cdfbfe 100644
--- a/src/Response/Asset/Video.php
+++ b/src/Response/Asset/Video.php
@@ -35,7 +35,11 @@ public function __construct(
         private readonly ?int $width,
         #[Property(description: 'Height', type: 'integer', example: 1080)]
         private readonly ?int $height,
-        #[Property(description: 'Path to Image Thumbnail', type: 'string', example: '/path/to/video/imagethumbnail.jpg')]
+        #[Property(
+            description: 'Path to Image Thumbnail',
+            type: 'string',
+            example: '/path/to/video/imagethumbnail.jpg'
+        )]
         private readonly?string $imageThumbnailPath,
         string $iconName,
         bool $hasChildren,
diff --git a/src/Response/Schemas.php b/src/Response/Schemas.php
index a2d6f6534..c7f2ead0c 100644
--- a/src/Response/Schemas.php
+++ b/src/Response/Schemas.php
@@ -32,7 +32,7 @@
  */
 final readonly class Schemas
 {
-    public const Assets = [
+    public const ASSETS = [
        Image::class,
        Document::class,
        Audio::class,
@@ -43,7 +43,7 @@
        Unknown::class,
     ];
 
-    public const Errors = [
+    public const ERRORS = [
         Error::class,
         DevError::class,
     ];
diff --git a/src/Service/GenericData/V1/DataObjectQuery.php b/src/Service/GenericData/V1/DataObjectQuery.php
index 9e0b7213a..6d088c13f 100644
--- a/src/Service/GenericData/V1/DataObjectQuery.php
+++ b/src/Service/GenericData/V1/DataObjectQuery.php
@@ -23,6 +23,7 @@
 use Pimcore\Bundle\GenericDataIndexBundle\Model\Search\Modifier\Filter\Tree\PathFilter;
 use Pimcore\Bundle\GenericDataIndexBundle\Model\Search\Modifier\FullTextSearch\ElementKeySearch;
 use Pimcore\Bundle\StaticResolverBundle\Models\DataObject\ClassDefinitionResolverInterface;
+use Pimcore\Bundle\StudioApiBundle\Exception\ClassDefinitionNotFoundException;
 
 final class DataObjectQuery implements QueryInterface
 {
@@ -86,7 +87,9 @@ public function excludeFolders(): self
     public function setClassDefinitionName(string $classDefinitionId): self
     {
         $classDefinition = $this->classDefinitionResolver->getByName($classDefinitionId);
-
+        if($classDefinition === null) {
+            throw new ClassDefinitionNotFoundException(400, 'Class definition not found');
+        }
         $this->search->setClassDefinition($classDefinition);
 
         return $this;
diff --git a/src/Service/OpenApiServiceInterface.php b/src/Service/OpenApiServiceInterface.php
index a05dd4abe..b0c6af025 100644
--- a/src/Service/OpenApiServiceInterface.php
+++ b/src/Service/OpenApiServiceInterface.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 
 /**
  * Pimcore