title: Symfony 4 - Unable to find template
body: <p>I updated my project to Symfony4. 
  When I go to some page with a form I have this error appearing : </p>
  
  <pre><code>Unable to find template "StarRatingBundle::rating.html.twig" 
  (looked into: /templates, /templates, \vendor\symfony\twig-bridge/Resources/views/Form).
  </code></pre>
  
  <p>I use <code>blackknight467/star-rating-bundle</code> a bundle which provides a twig extension to have a star rating system. The template in the error is located in this bundle <code>Resources/views</code> folder.</p>
  
  <p><strong>Twig.yaml</strong> :</p>
  
  <pre><code>twig:
      paths: ['%kernel.project_dir%/templates']
      debug: '%kernel.debug%'
      strict_variables: '%kernel.debug%'
      form_themes:
          - 'Form/fields.html.twig'
  </code></pre>