Fatal error: Uncaught Error: Class 'Symfony\Component\String\AbstractString' not found in G:\projects\stage.api.edutalk.edu.vn\vendor\symfony\string\AbstractUnicodeString.php:29 Stack trace: #0 {main} thrown in G:\projects\stage.api.edutalk.edu.vn\vendor\symfony\string\AbstractUnicodeString.php on line 29