Fatal error: Uncaught Error: Interface "Composer\Plugin\PluginInterface" not found in /home/cmsshareacopy/public_html/TYPO3/vendor/typo3/cms-composer-installers/src/Installer/Plugin.php:29 Stack trace: #0 {main} thrown in /home/cmsshareacopy/public_html/TYPO3/vendor/typo3/cms-composer-installers/src/Installer/Plugin.php on line 29