Fatal error: Uncaught Error: Class 'Composer\Installers\BaseInstaller' not found in D:\xampp\htdocs\dole09\wp-content\plugins\magazine-blocks\vendor\composer\installers\src\Composer\Installers\MediaWikiInstaller.php:4 Stack trace: #0 {main} thrown in D:\xampp\htdocs\dole09\wp-content\plugins\magazine-blocks\vendor\composer\installers\src\Composer\Installers\MediaWikiInstaller.php on line 4