When upgrading from Devel 8.x-2.x to Devel 8.x-4.x in a composer based build, how do I handle the Kint module being removed per Remove Kint module and create a kint dumper plugin in devel?

The service container can't be created because the Kint class is missing. I'll add the class path to Kint when I blow up the build again. :) Thank you.

  • Did you try upgrading from 2 to 3, and then 3 to 4? Commented Mar 9, 2021 at 2:24

3 Answers 3


Since Devel 4 you have to add Kint youself:

composer require drupal/devel kint-php/kint

You can read through this epic issue to learn more: Unknown "kint" function. in Twig\ExpressionParser.

Also important to read the release notes. On all 4.0.0+ releases the following is written. You have to do this before upgrading:

If you have Kint module enabled, please run these commands before upgrading:

  1. drush pm:uninstall kint or uninstall Kint using the Drupal UI
  2. composer require kint-php/kint

To fix any Kint-missing-module-error, simply downgrade Devel composer require 'drupal/devel:^2.1', uninstall Kint drush pmu kint and then upgrade again composer require drupal/devel kint-php/kint.

  • I've upgraded to 9 and updated devel before I uninstalled kint. I'm now stuck. When I try to enable other modules, I get this error: Drupal\Core\Extension\Exception\UnknownExtensionException: The module kint does not exist. Commented Jun 8, 2021 at 12:13
  • 1
    @AbdulSadikYalcin – Downgrade like described in the last section of my post. Or create a bare bone custom module with just an info file. web/modules/custom/kint/kint.info.yml. Fill the info file, see drupal.org/docs/creating-custom-modules/…. Then run drush pmu kint, done.
    – leymannx
    Commented Jun 8, 2021 at 16:37
  • Downgrading is not an option unfortunately. Done too much work to risk losing. I'll try creating a dummy kint module and see how it goes. Commented Jun 18, 2021 at 16:41

The problem was I was including

// Change Kint maxLevels setting.
// @see https://gist.github.com/JPustkuchen/a5f1eaeb7058856b7ef087b028ffdfeb
include_once(DRUPAL_ROOT . '/modules/contrib/devel/kint/kint/Kint.class.php');
if (class_exists('Kint')) {
  Kint::$maxLevels = 6;

in settings.local.php. I recall reading somewhere that the default maxLevels in Kint is now 6 which makes the custom code snippet unnecessary. When I removed it, removed kint from core.extension.yml (in our case config_split.local) and added kint-php/kint via composer, all was well.

Thanks again @leymannx


If you are facing the issue.
Use the development module 4.x-dev
If you are using the 4+ versions then use development version 4.x-dev . https://www.drupal.org/project/devel

$ composer require drupal/devel:4.x-dev 
$ composer require kint-php/kint 
$ drush en -y devel

Enable Twig debugging it in development.services.yml file

    debug: true
    auto_reload: null
    cache: false

Goto /admin/config/development/devel and
set the "Variables dumper" to "Kint"

Add {{ kint() }} into template files.

  • 1
    Or just composer require drupal/devel_kint_extras && drush -y en devel_kint_extras. It gets the other dependencies automagically.
    – leymannx
    Commented Nov 17, 2021 at 18:41
  • Thank you @leymannx Commented Nov 18, 2021 at 5:57

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