After updating the Panels module to 8.x-4.2, I got the following error whenever I submit any form in the site.

Drupal\Component\Plugin\Exception\PluginNotFoundException: The "twocol" plugin does not exist. in Drupal\Core\Plugin\DefaultPluginManager->doGetDefinition() (line 52 of /var/www/test_site/core/lib/Drupal/Component/Plugin/Discovery/DiscoveryTrait.php).

  • Did you clear the cache and run any db updates? – Patrick Kenny Nov 10 '17 at 5:40
  • Yes, I did clear the cache "drush cache-regenerate" also run the database update "drush updatedb -y" The problem still exists. I'm using Drupal 8.4.0 – fkaufusi Nov 12 '17 at 22:16

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