Fatal error: Uncaught Error: Interface "Minishlink\WebPush\SubscriptionInterface" not found in /home/ss294870/masa-web.jp/public_html/webpush.masa-web.jp/vendor/minishlink/web-push/src/Subscription.php:16 Stack trace: #0 {main} thrown in /home/ss294870/masa-web.jp/public_html/webpush.masa-web.jp/vendor/minishlink/web-push/src/Subscription.php on line 16