Fatal error: Uncaught Error: Class "PhpSpec\ObjectBehavior" not found in /home/capacita/public_html/aula.certificateperu.com/vendor/php-xapi/symfony-serializer/spec/SerializerSpec.php:7 Stack trace: #0 {main} thrown in /home/capacita/public_html/aula.certificateperu.com/vendor/php-xapi/symfony-serializer/spec/SerializerSpec.php on line 7