Fatal error: Uncaught Error: Class "Composer\Installers\BaseInstaller" not found in /home/yrdsb11w3creativ/public_html/yrdsb/vendor/composer/installers/src/Composer/Installers/Symfony1Installer.php:9 Stack trace: #0 {main} thrown in /home/yrdsb11w3creativ/public_html/yrdsb/vendor/composer/installers/src/Composer/Installers/Symfony1Installer.php on line 9