Class "Kint\Renderer\Renderer" not found

Hi,
I am getting the error below after I upgraded to 4.3 (from 4.2.11).

Class "Kint\Renderer\Renderer" not found
SYSTEMPATH/Config/Factories.php at line 129

I noticed that Composer removed Kint during "composer update", but did not install the newer version. However, it (newer version, 5.0.1) is under "requires (dev)" section of CI4 on packagist.org.
So, I added "kint-php/kint": "^5.0.1" to composer.json and ran "composer update" again, which installed Kint 5.0.2, but the error did not go away.

Any suggestions ?

Thanks