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

@kenjis 
my feedback to seniors and what i did for juniors like me to have succefully access desired page. 
1) downloaded CI4 manually from official website
2) extracted in folder E:\xampp\htdocs\ci4test\ 
3) copied env file to .env and added  " app.baseURL = 'http://localhost:8088/ci4test/public' "
4) after initial test run, created my Tests as mentioned in starting post here ( App\Controllers\Tasks.php  and App\Views\Tasks\index.php create from Home.php and Home\index.php )
5) test run fail again
6) googled again, now today i found some solutions and its done (very basic, but it was successfully run by instructer Dave Hollingworth in video course  without entries in Routes.php, he only changed $routes->setAutoRoute(false); to true . when i added an entry in Routes.php as $routes->get('/tasks', 'Tasks::index'); and in browser enter http://localhost:8088/ci4test/public/tasks then it is showing what it has to.
is this due to some changes/enhncements/security or something else i failed to understand? please guide us.
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.