Fatal error: Uncaught Error: Interface 'Composer\Plugin\PluginInterface' not found in E:\xampp\htdocs\www\key\vendor\kylekatarnls\update-helper\src\UpdateHelper\ComposerPlugin.php:11 Stack trace: #0 {main} thrown in E:\xampp\htdocs\www\key\vendor\kylekatarnls\update-helper\src\UpdateHelper\ComposerPlugin.php on line 11