Fatal error: Uncaught Error: Class "Symfony\Component\String\AbstractString" not found in /var/www/html/casavio-qa.das24.it/releases/16/vendor/symfony/string/AbstractUnicodeString.php:29 Stack trace: #0 {main} thrown in /var/www/html/casavio-qa.das24.it/releases/16/vendor/symfony/string/AbstractUnicodeString.php on line 29