Fatal error: Uncaught Error: Class 'Composer\Installers\BaseInstaller' not found in /home/clmepl5/public_html/web/app/plugins/sitepress-multilingual-cms/vendor/composer/installers/src/Composer/Installers/Concrete5Installer.php:4 Stack trace: #0 {main} thrown in /home/clmepl5/public_html/web/app/plugins/sitepress-multilingual-cms/vendor/composer/installers/src/Composer/Installers/Concrete5Installer.php on line 4