Fatal error: Uncaught Error: Class 'Composer\Installer\LibraryInstaller' not found in /home/luxurytr/public_html/lt8/vendor/craftcms/plugin-installer/src/Installer.php:20 Stack trace: #0 {main} thrown in /home/luxurytr/public_html/lt8/vendor/craftcms/plugin-installer/src/Installer.php on line 20