Fatal error: Uncaught Error: Interface "Amp\Serialization\Serializer" not found in /var/www/dev2/data/www/dev2.crosshub.ru/premium-fitness/vendor/amphp/serialization/src/JsonSerializer.php:5 Stack trace: #0 {main} thrown in /var/www/dev2/data/www/dev2.crosshub.ru/premium-fitness/vendor/amphp/serialization/src/JsonSerializer.php on line 5