Fatal error: Uncaught Error: Interface "GuzzleHttp\MessageFormatterInterface" not found in /home/ss294870/masa-web.jp/public_html/webpush.masa-web.jp/vendor/guzzlehttp/guzzle/src/MessageFormatter.php:38 Stack trace: #0 {main} thrown in /home/ss294870/masa-web.jp/public_html/webpush.masa-web.jp/vendor/guzzlehttp/guzzle/src/MessageFormatter.php on line 38