Filter Interface not Found Error

I m Facing this error  in codeignitor 4.3.1 please Help Me inInterface 'codeIgniter\Filters\FilterInterface' not found

Are you taking about a filter you created at app/Filters

eg i have myFilter.php (yeah coder have no imagination)

myFilter.php starts

Code:

<?php namespace App\Filters;

use CodeIgniter\HTTP\RequestInterface;
use CodeIgniter\HTTP\ResponseInterface;
use CodeIgniter\Filters\FilterInterface;


class MyFilter implements FilterInterface
{

what do you have in yours ?

CMS CI4     I use Arch Linux by the way