Fatal error: Uncaught Error: Interface 'Composer\Plugin\PluginInterface' not found in /home/flexinettek/public_html/vendor/kylekatarnls/update-helper/src/UpdateHelper/ComposerPlugin.php:11 Stack trace: #0 {main} thrown in /home/flexinettek/public_html/vendor/kylekatarnls/update-helper/src/UpdateHelper/ComposerPlugin.php on line 11