Fatal error: Uncaught Error: Interface 'Composer\Plugin\PluginInterface' not found in /home/nordenblock/public_html/styrocoat/vendor/typo3/cms-composer-installers/src/Installer/Plugin.php:34 Stack trace: #0 {main} thrown in /home/nordenblock/public_html/styrocoat/vendor/typo3/cms-composer-installers/src/Installer/Plugin.php on line 34