diff --git a/src/Bundle/ChillPersonBundle/Export/Filter/AccompanyingCourseFilters/SocialActionFilter.php b/src/Bundle/ChillPersonBundle/Export/Filter/AccompanyingCourseFilters/SocialActionFilter.php
index 8bb098861..78abb176f 100644
--- a/src/Bundle/ChillPersonBundle/Export/Filter/AccompanyingCourseFilters/SocialActionFilter.php
+++ b/src/Bundle/ChillPersonBundle/Export/Filter/AccompanyingCourseFilters/SocialActionFilter.php
@@ -119,7 +119,7 @@ final readonly class SocialActionFilter implements FilterInterface
 
     public function normalizeFormData(array $formData): array
     {
-        return ['accepted_socialactions' => $formData['accepted_socialactions'], 'start_date_after' => $formData['start_date_after']->normalize(), 'start_date_before' => $formData['start_date_before']->normalize(), 'end_date_after' => $formData['end_date_after']->normalize(), 'end_date_before' => $formData['end_date_before']->normalize()];
+        return ['accepted_socialactions' => $formData['accepted_socialactions'], 'start_date_after' => $formData['start_date_after']?->normalize(), 'start_date_before' => $formData['start_date_before']?->normalize(), 'end_date_after' => $formData['end_date_after']?->normalize(), 'end_date_before' => $formData['end_date_before']?->normalize()];
     }
 
     public function denormalizeFormData(array $formData, int $fromVersion): array
diff --git a/src/Bundle/ChillPersonBundle/Tests/Export/Filter/AccompanyingCourseFilters/ReferrerFilterBetweenDatesTest.php b/src/Bundle/ChillPersonBundle/Tests/Export/Filter/AccompanyingCourseFilters/ReferrerFilterBetweenDatesTest.php
index 8415e2017..cb8bbecd4 100644
--- a/src/Bundle/ChillPersonBundle/Tests/Export/Filter/AccompanyingCourseFilters/ReferrerFilterBetweenDatesTest.php
+++ b/src/Bundle/ChillPersonBundle/Tests/Export/Filter/AccompanyingCourseFilters/ReferrerFilterBetweenDatesTest.php
@@ -12,6 +12,7 @@ declare(strict_types=1);
 namespace src\Bundle\ChillPersonBundle\Tests\Export\Filter\AccompanyingCourseFilters;
 
 use Chill\MainBundle\Entity\User;
+use Chill\MainBundle\Repository\UserRepositoryInterface;
 use Chill\MainBundle\Service\RollingDate\RollingDate;
 use Chill\MainBundle\Service\RollingDate\RollingDateConverterInterface;
 use Chill\MainBundle\Templating\Entity\UserRender;
@@ -30,17 +31,20 @@ class ReferrerFilterBetweenDatesTest extends AbstractFilterTest
     private RollingDateConverterInterface $rollingDateConverter;
     private UserRender $userRender;
 
+    private UserRepositoryInterface $userRepository;
+
     protected function setUp(): void
     {
         parent::setUp();
         self::bootKernel();
         $this->rollingDateConverter = self::getContainer()->get(RollingDateConverterInterface::class);
         $this->userRender = self::getContainer()->get(UserRender::class);
+        $this->userRepository = self::getContainer()->get(UserRepositoryInterface::class);
     }
 
     public function getFilter()
     {
-        return new ReferrerFilterBetweenDates($this->rollingDateConverter, $this->userRender);
+        return new ReferrerFilterBetweenDates($this->rollingDateConverter, $this->userRender, $this->userRepository);
     }
 
     public static function getFormData(): array