symfony
diff --git a/‎src/Symfony/Component/Notifier/Bridge/RocketChat/RocketChatTransport.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Notifier/Bridge/RocketChat/RocketChatTransport.php
+4-1Lines changed: 4 additions & 1 deletion b/‎src/Symfony/Component/Notifier/Bridge/RocketChat/RocketChatTransport.php
Copy file name to clipboardExpand all lines: src/Symfony/Component/Notifier/Bridge/RocketChat/RocketChatTransport.php
+4-1Lines changed: 4 additions & 1 deletion
@@ -99,7 +99,10 @@ protected function doSend(MessageInterface $message): SentMessage
         $success = $response->toArray(false);
 
         $sentMessage = new SentMessage($message, (string) $this);
-        $sentMessage->setMessageId($success['message']['_id']);
+
+        if (\array_key_exists('message', $success) && \array_key_exists('_id', $success['message'])) {
+            $sentMessage->setMessageId($success['message']['_id']);
+        }
 
         return $sentMessage;
     }