Fatal error: Uncaught Error: Interface "Composer\Plugin\PluginInterface" not found in /home/.sites/site4/wwwroot/web/4.0/ui/vendor/phpstan/extension-installer/src/Plugin.php:28 Stack trace: #0 {main} thrown in /home/.sites/site4/wwwroot/web/4.0/ui/vendor/phpstan/extension-installer/src/Plugin.php on line 28