Why is it prompted that the controller cannot be loaded?

This is the code and path of the controller

<code><?php
namespace Home\Controller;
use Think\Controller;
class IndexController extends Controller {
    public function qq(){
        $this->display();
    }
}
?></code>

This is the path to the view template

This is how I visited

<code>http://localhost/a/qq/index.php/home/first/qq</code>

Then prompt this error

Reply content:

This is the code and path of the controller

<code><?php
namespace Home\Controller;
use Think\Controller;
class IndexController extends Controller {
    public function qq(){
        $this->display();
    }
}
?></code>

This is the path to the view template

This is how I visited

<code>http://localhost/a/qq/index.php/home/first/qq</code>

Then prompt this error

Note the class name

Looks like you should be using the TP framework. The controller file name and class name of the TP framework should be consistent.