Fatal error: Uncaught Error: Class "Symfony\Component\Mime\Header\UnstructuredHeader" not found in E:\phpProject\TEST\fr_epr\fr_epr_reg\vendor\symfony\mime\Header\ParameterizedHeader.php:19 Stack trace: #0 {main} thrown in E:\phpProject\TEST\fr_epr\fr_epr_reg\vendor\symfony\mime\Header\ParameterizedHeader.php on line 19