Fatal error: Uncaught Error: Interface "GuzzleHttp\Promise\PromiseInterface" not found in /home/ss294870/masa-web.jp/public_html/webpush.masa-web.jp/vendor/guzzlehttp/promises/src/RejectedPromise.php:15 Stack trace: #0 {main} thrown in /home/ss294870/masa-web.jp/public_html/webpush.masa-web.jp/vendor/guzzlehttp/promises/src/RejectedPromise.php on line 15