title: Why is the rendering-definition of my Mask-Content-Element missing?
body: <p>I have created some CE types with ext:mask and if I insert a CE in the page in the FE this error appears:</p>
  
  <blockquote>
    <p>Content Element type "mask_my_own_ce" has no rendering definition!</p>
  </blockquote>
  
  <p>I have inserted the static template of mask, and just edited the generated fluid template</p>