Fatal error: Uncaught Error: Class "Jose\Component\Signature\Serializer\Serializer" not found in /home/ss294870/masa-web.jp/public_html/webpush.masa-web.jp/vendor/web-token/jwt-library/Signature/Serializer/JSONGeneralSerializer.php:18 Stack trace: #0 {main} thrown in /home/ss294870/masa-web.jp/public_html/webpush.masa-web.jp/vendor/web-token/jwt-library/Signature/Serializer/JSONGeneralSerializer.php on line 18