diff --git a/mailpoet/lib/Cron/Workers/SendingQueue/SendingQueue.php b/mailpoet/lib/Cron/Workers/SendingQueue/SendingQueue.php
index 7c7221d265..ce6f94ea90 100644
--- a/mailpoet/lib/Cron/Workers/SendingQueue/SendingQueue.php
+++ b/mailpoet/lib/Cron/Workers/SendingQueue/SendingQueue.php
@@ -284,6 +284,8 @@ class SendingQueue {
       $subscriberEntity = $this->subscribersRepository->findOneById($subscriber->id);
       if ($subscriberEntity instanceof SubscriberEntity) {
         $metas[] = $this->mailerMetaInfo->getNewsletterMetaInfo($newsletter, $subscriberEntity);
+      } else {
+        $metas[] = [];
       }
 
       // keep track of values for statistics purposes