View file phpBB3/config/default/container/services_help.yml

services:
    phpbb.help.manager:
        class: phpbb\help\manager
        arguments:
            - '@dispatcher'
            - '@language'
            - '@template'

    phpbb.help.controller.bbcode:
        class: phpbb\help\controller\bbcode
        arguments:
            - '@controller.helper'
            - '@phpbb.help.manager'
            - '@template'
            - '@language'
            - '%core.root_path%'
            - '%core.php_ext%'

    phpbb.help.controller.faq:
        class: phpbb\help\controller\faq
        arguments:
            - '@controller.helper'
            - '@phpbb.help.manager'
            - '@template'
            - '@language'
            - '%core.root_path%'
            - '%core.php_ext%'