mollom action plugin does not exist

Problem

Getting the following error when naivating to https://www.foo.dev/admin/config/system/actions/:

Drupal\Component\Plugin\Exception\PluginNotFoundException: The "mollom_comment_unpublish_action" plugin does not exist. in Drupal\Core\Plugin\DefaultPluginManager->doGetDefinition() (line 57 of /var/www/foo/core/lib/Drupal/Component/Plugin/Discovery/DiscoveryTrait.php).

Error appeared after removing and re-enabling the module. Every time I try enabling it i get this error:

Drupal\Core\Config\PreExistingConfigException: Configuration objects [error]
(mollom.settings) provided by mollom already exist in active
configuration in
/var/www/foo/core/lib/Drupal/Core/Config/PreExistingConfigException.php:70
Stack trace:
#0
/var/www/foo/core/lib/Drupal/Core/Config/ConfigInstaller.php(476):
Drupal\Core\Config\PreExistingConfigException::create('mollom',
Array)
#1
/var/www/foo/core/lib/Drupal/Core/ProxyClass/Config/ConfigInstaller.php(136):
Drupal\Core\Config\ConfigInstaller->checkConfigurationToInstall('module',
'mollom')
#2
/var/www/foo/core/lib/Drupal/Core/Extension/ModuleInstaller.php(146):
Drupal\Core\ProxyClass\Config\ConfigInstaller->checkConfigurationToInstall('module',
'mollom')
#3
/var/www/foo/core/lib/Drupal/Core/ProxyClass/Extension/ModuleInstaller.php(87):
Drupal\Core\Extension\ModuleInstaller->install(Array, true)
#4
phar:///usr/local/bin/drush/commands/core/drupal/environment.inc(131):
Drupal\Core\ProxyClass\Extension\ModuleInstaller->install(Array,
true)

I had to manually drop the Mollom rows from the config table of the drupal database to be able to enable it again.

Drupal: 8.1.x-dev
PHP: 7.0.4