I have a cpt (hierarchial and no archive) with the slug ‘goals’, resulting in url /goals/cpt-1, served by single-goals.php. This is perfect.
I have a normal page “Goals” with permalink /goals/ served by single.php. This is perfect.
When i create a child-page to “goals”, the permalink in the backed create a permalink called /goals/child-page, but the url gives 404.

How can I solve this? The site uses WPML for translation.

Thanks!

Read more here:: Childpage under slug of custom post type