Fatal error: Uncaught Error: Interface 'Composer\Plugin\PluginInterface' not found in /home/Filipie/public_html/mikolgallery/forum/phpBB3/vendor/composer/package-versions-deprecated/src/PackageVersions/Installer.php:34 Stack trace: #0 {main} thrown in /home/Filipie/public_html/mikolgallery/forum/phpBB3/vendor/composer/package-versions-deprecated/src/PackageVersions/Installer.php on line 34