Fatal error: Uncaught Error: Class "Composer\Installer\LibraryInstaller" not found in /home/alwatancl/public_html/wp-content/plugins/wp-whatsapp-chat/vendor/automattic/jetpack-composer-plugin/src/class-manager.php:18 Stack trace: #0 {main} thrown in /home/alwatancl/public_html/wp-content/plugins/wp-whatsapp-chat/vendor/automattic/jetpack-composer-plugin/src/class-manager.php on line 18