Fatal error: Uncaught Error: Class 'Symfony\Component\String\AbstractUnicodeString' not found in D:\xampp\htdocs\psp\backend\vendor\symfony\string\UnicodeString.php:33
Stack trace:
#0 {main}
thrown in D:\xampp\htdocs\psp\backend\vendor\symfony\string\UnicodeString.php on line 33