Fatal error: Uncaught Error: Class "Installer\Shell\Task\PluginInstall" not found in C:\xampp\htdocs\QuickApps\plugins\Installer\src\Shell\Task\PluginUpdateTask.php:18 Stack trace: #0 {main} thrown in C:\xampp\htdocs\QuickApps\plugins\Installer\src\Shell\Task\PluginUpdateTask.php on line 18