Fatal error: Uncaught Error: Class "Composer\Installers\BaseInstaller" not found in /home/aipnbsfo/public_html/vendor/composer/installers/src/Composer/Installers/TYPO3FlowInstaller.php:7 Stack trace: #0 {main} thrown in /home/aipnbsfo/public_html/vendor/composer/installers/src/Composer/Installers/TYPO3FlowInstaller.php on line 7