Fatal error: Uncaught Error: Interface "Psy\VersionUpdater\Downloader" not found in C:\WebServer\htdocs\bookshelf\vendor\psy\psysh\src\ManualUpdater\GhDownloader.php:22 Stack trace: #0 {main} thrown in C:\WebServer\htdocs\bookshelf\vendor\psy\psysh\src\ManualUpdater\GhDownloader.php on line 22