ArgumentCountError appears when using ECA

+1 confirmed that it fixed the ECA with payment issues!!

Patch of #2 makes sense. Currently there is an implementation as follows within Drupal\payment\Plugin\Action\UnsetLineItem:

<?php
/**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    return new static($configuration, $plugin_id, $plugin_definition, $container->get('string_translation'));
  }
?>

hovever the plugin currently does not implement the according interface, which prevents third party modules like ECA to recognize the instantiation method, leading to the problem reported here.

Confirmed, and setting to RTBC.