Fatal error: Uncaught Error: Interface "Composer\Plugin\PluginInterface" not found in C:\xampp\htdocs\retrodex\helpdesk\vendor\symfony\flex\src\Flex.php:61 Stack trace: #0 {main} thrown in C:\xampp\htdocs\retrodex\helpdesk\vendor\symfony\flex\src\Flex.php on line 61