Eu tento instalar o pacote de usuário administrador do sonata no projeto symfony 4:

composer create-project symfony/website-skeleton my-project
composer require sonata-project/admin-bundle

Mas eu recebo este erro:

Script cache:clear returned with error code 1
!!
!!  In CheckExceptionOnInvalidReferenceBehaviorPass.php line 32:
!!
!!    The service "sonata.admin.block.admin_list" has a dependency on a non-existent service "templating".

O que eu posso fazer?