Fatal error: Uncaught Error: Class "Robo\Task\Base\Exec" not found in C:\Apache24\htdocs\cms_upgrade\vendor\consolidation\robo\src\Task\Development\PhpServer.php:29 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cms_upgrade\vendor\consolidation\robo\src\Task\Development\PhpServer.php on line 29