升级到2.7后，您已请求不存在的服务“templating.helper.form”

In one of my class I use service form helper like: $this->container->get('templating.helper.form'); after upgrade from version 2.6 to 2.7, I get an exception:

You have requested a non-existent service "templating.helper.form".

I read the upgrade guide but found nothing related to this. I Run container:debug as well but not contains that service.

But all of my form works well, Anybody know why ? what is "templating.helper.form" service is replaced with ?

Thanks

That's strange, but you have to add php as a templating engine, like that:

framework:
    templating:
        engines: ['twig', 'php']

See more at https://github.com/symfony/symfony/issues/14790