diff --git a/src/app/action/controllers/ActionMethodController.php b/src/app/action/controllers/ActionMethodController.php
index 48bd35f7dbe531685ebea9c3e36dab47f62e18d0..1af85c6bd096a27126b4717b0e04b3cd65b64f8d 100644
--- a/src/app/action/controllers/ActionMethodController.php
+++ b/src/app/action/controllers/ActionMethodController.php
@@ -347,7 +347,7 @@ class ActionMethodController
                 if ($attachment['status'] == 'SEND_MASS') {
                     $generated = AttachmentController::generateMailing(['id' => $attachment['res_id'], 'userId' => $GLOBALS['id']]);
                     if (!empty($generated['errors'])) {
-                        return ['errors' => $generated['errors']];
+                        return ['errors' => [$generated['errors']]];
                     }
                 }
             }
@@ -397,7 +397,7 @@ class ActionMethodController
             foreach ($attachments as $attachment) {
                 $generated = AttachmentController::generateMailing(['id' => $attachment['res_id'], 'userId' => $GLOBALS['id']]);
                 if (!empty($generated['errors'])) {
-                    return ['errors' => $generated['errors']];
+                    return ['errors' => [$generated['errors']]];
                 }
             }
         }
diff --git a/src/app/action/controllers/ExternalSignatoryBookTrait.php b/src/app/action/controllers/ExternalSignatoryBookTrait.php
index b51716950d4dfbce7bb3c123d31d164e19cb6591..6ddfd985780095fdc3f29742f6707f037ead2a9b 100644
--- a/src/app/action/controllers/ExternalSignatoryBookTrait.php
+++ b/src/app/action/controllers/ExternalSignatoryBookTrait.php
@@ -52,7 +52,7 @@ trait ExternalSignatoryBookTrait
                     if ($attachment['status'] == 'SEND_MASS') {
                         $generated = AttachmentController::generateMailing(['id' => $attachment['res_id'], 'userId' => $GLOBALS['id']]);
                         if (!empty($generated['errors'])) {
-                            return ['errors' => $generated['errors']];
+                            return ['errors' => [$generated['errors']]];
                         }
                     }
                 }