Fatal error: Uncaught Error: Class "Symfony\Component\String\AbstractUnicodeString" not found in /home/appdemo/public_html/samena-mailer/vendor/symfony/string/CodePointString.php:25 Stack trace: #0 {main} thrown in /home/appdemo/public_html/samena-mailer/vendor/symfony/string/CodePointString.php on line 25