[Resuelto] WPML didn't manage to translate this page.

Background of the issue:
I have a problem with WPML not managing to translate a page on my site enlace oculto. I don't speak English well, so I don't comment on videos.

Symptoms:
WPML didn't manage to translate this page: enlace oculto

Questions:
Why didn't WPML manage to translate the page?
Is there any documentation that can help with this issue?