An exception has been thrown during the compilation of a template ("You must add FOSCommentBundle to the assetic.bundle config to use the
{% javascripts %}tag in FOSCommentBundle:Thread:async.html.twig.") in "FOSCommentBundle:Thread:async.html.twig".
And this is my Config.yml flile
fos_comment:
    db_driver: orm
    class:
        model:
            comment: Esprit\CommentBundle\MyBundle\Entity\Comment
            thread: Esprit\CommentBundle\Entity\Thread  
assetic:
    bundles: [ FOSCommentBundle ]
    fos_comment_api:
        type: rest
        resource: "@FOSCommentBundle/Resources/config/routing.yml"
        prefix: /api    
        defaults: { _format: html } 
 
                        
Add FOSCommentBundle into your Assetic configuration in config.html