Symfony2 genj / faq-bundle

Hi I'm trying to install the genj/faq-bundle on Symfony 2.8. I have followed the step in the documentation: https://github.com/genj/GenjFaqBundle

But when I'm trying to do the schema update. There is nothing to update. And when I go to the /faq route, I have this error:

The class 'Genj\FaqBundle\Entity\Category' was not found in the chain configured namespaces FM\UserBundle\Entity, FOS\UserBundle\Entity

What is the problem?

Found it... It was a mapping problem in my config.yml. The auto_mapping was false

auto_mapping: true

Did you try the force flag?

php app/console doctrine:schema:update --force