title: Symfony Unable to find template "" error only in Amazon Web Service
body: <p>I have a Symfony project running in Amazon Web Service. It has an option to generate a xlsx file to download (export data option). This option fail with the message:</p>
  
  <blockquote>
    <p>Unable to find template "" (looked into: / home / ubuntu / emilpa /
    emilpa / app / Resources / views, / home / ubuntu / emilpa / emilpa /
    vendor / symfony / symfony / src / Symfony / Bridge / Twig / Resources
    / views / Form).</p>
  </blockquote>
  
  <p>I do not understand, In my machine I can not reproduce this error because it is working fine.</p>