Doesn't work with Webform 8.x-5.13

Just tried version 2.0.0 on simpletest.me but doesn't work:

 [success] Installation complete.
62027aaaf8ba3c5cfa8bdd2e# /bin/sh -c cd "${DOCROOT}" && ../vendor/bin/drush en ga_webform -y
The following module(s) will be enabled: ga_webform, ga, webform
// Do you want to continue?: yes.
[warning] Declaration of Drupal\webform\EventSubscriber\WebformExceptionHtmlSubscriber::on403(Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent $event) should be compatible with Drupal\Core\EventSubscriber\DefaultExceptionHtmlSubscriber::on403(Symfony\Component\HttpKernel\Event\ExceptionEvent $event) WebformExceptionHtmlSubscriber.php:31
[warning] Declaration of Drupal\webform\EventSubscriber\WebformExceptionHtmlSubscriber::onException(Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent $event) should be compatible with Drupal\Core\EventSubscriber\HttpExceptionSubscriberBase::onException(Symfony\Component\HttpKernel\Event\ExceptionEvent $event) WebformExceptionHtmlSubscriber.php:31
In Container.php line 156:
                                                               
  You have requested a non-existent service "entity.manager".
Command Failed (Tugboat Error 1064): Exit code (1)

Thanks!