diff --git a/src/Controller/AdminPages/BaseAdminController.php b/src/Controller/AdminPages/BaseAdminController.php
index 9e45e0dc..c341041a 100644
--- a/src/Controller/AdminPages/BaseAdminController.php
+++ b/src/Controller/AdminPages/BaseAdminController.php
@@ -364,7 +364,9 @@ abstract class BaseAdminController extends AbstractController
 
                 foreach ($errors as $name => $error) {
                     /** @var ConstraintViolationList $error */
-                    $this->addFlash('error', $name.': '.$error['violations']);
+                    foreach ($error['violations'] as $violation) {
+                        $this->addFlash('error', $name.': '.$violation->getMessage());
+                    }
                 }
             }
             catch (UnexpectedValueException $e) {