Fatal error: Uncaught Error: Class "Composer\Installer\LibraryInstaller" not found in C:\xampp\htdocs\arthurkotsch.online\vendor\yiisoft\yii2-composer\Installer.php:22 Stack trace: #0 {main} thrown in C:\xampp\htdocs\arthurkotsch.online\vendor\yiisoft\yii2-composer\Installer.php on line 22