From b9ab0ad73fcd432c577f33e06da55df6def8ba06 Mon Sep 17 00:00:00 2001
From: dima-gr <dimastanchick@gmail.com>
Date: Fri, 17 Sep 2021 12:02:28 +0300
Subject: [PATCH] [Notifier] Update FirebaseTransport.php

---
 .../Component/Notifier/Bridge/Firebase/FirebaseTransport.php    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Symfony/Component/Notifier/Bridge/Firebase/FirebaseTransport.php b/src/Symfony/Component/Notifier/Bridge/Firebase/FirebaseTransport.php
index 2ad0848bf2049..526ad5eb6ac85 100644
--- a/src/Symfony/Component/Notifier/Bridge/Firebase/FirebaseTransport.php
+++ b/src/Symfony/Component/Notifier/Bridge/Firebase/FirebaseTransport.php
@@ -96,7 +96,7 @@ protected function doSend(MessageInterface $message): SentMessage
         $success = $response->toArray(false);
 
         $sentMessage = new SentMessage($message, (string) $this);
-        $sentMessage->setMessageId($success['results'][0]['message_id']);
+        $sentMessage->setMessageId($success['results'][0]['message_id'] ?? '');
 
         return $sentMessage;
     }