Fatal error: Uncaught Error: Interface "Composer\Plugin\PluginInterface" not found in C:\xampp\htdocs\hannoole\POS\vendor\wikimedia\composer-merge-plugin\src\MergePlugin.php:77 Stack trace: #0 {main} thrown in C:\xampp\htdocs\hannoole\POS\vendor\wikimedia\composer-merge-plugin\src\MergePlugin.php on line 77