Error 500 - Internal Server Error

Cannot load provider Dancer2::Plugin::Auth::Extensible::Provider::Database: Can't use string ("Dancer2::Core::Role::DSL") as a HASH ref while "strict refs" in use at (eval 168) line 48. BEGIN failed--compilation aborted at /usr/local/lib/perl5/site_perl/Dancer2/Plugin/Database.pm line 8. Compilation failed in require at /usr/local/lib/perl5/site_perl/Dancer2/Plugin/Auth/Extensible/Provider/Database.pm line 5. BEGIN failed--compilation aborted at /usr/local/lib/perl5/site_perl/Dancer2/Plugin/Auth/Extensible/Provider/Database.pm line 5. Compilation failed in require at /usr/local/lib/perl5/site_perl/Dancer2/Plugin/Auth/Extensible.pm line 547.

Powered by Dancer2 0.157000

plugins:

  Database:

    driver: 'mysql'

    database: 'dbname'

    host: 'x.x.x.x'

    username: 'user'

    password: 'password'

    connection_check_threshold: 10

    dbi_params:

      RaiseError: 1

      AutoCommit: 1

    on_connect_do: ["SET NAMES 'utf8'", "SET CHARACTER SET 'utf8'" ]

  Auth::Extensible:

    login_page: /user/login

    logout_page: /user/logout

    denied_page: /user/denied

    realms:

      clients:

        provider: 'Database'

        users_table: 'client'

        users_username_column: 'email'

        user_roles_role_id_column: 'role_id'

      staff:

        provider: 'Database'

        users_table: 'staff'

        users_username_column: 'email'

        user_roles_role_id_column: 'role_id'

Where am i mistaken?

Thanks.