Controller or its method is not found: \App\Controllers\Tasks::index

I cannot reproduce with CI 4.2.1.

I navigate http://localhost:8080/tasks and see "Welcome Tasks!"

See https://github.com/kenjis/ci421-tasks-index

thanks very much for your passions to help us.
downloaded your project .zip file, extracted in E:\xampp\htdocs and in app folder when run " php spark serve " it showed error as in screenshot: (is anything else i have to done for this?)

regards

Newbie here in CodeIgniter World !! Please appologize if any nonsense from me.  

environment: Windows 10, XAMPP 3.3.0, VS Code, SQLyog Community Ed.