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