Fatal error: Uncaught Error: Class 'Symfony\Component\String\AbstractUnicodeString' not found in /home/szfwxvyz/sms/sms-ito/vendor/symfony/string/UnicodeString.php:33 Stack trace: #0 {main} thrown in /home/szfwxvyz/sms/sms-ito/vendor/symfony/string/UnicodeString.php on line 33