I’ve tried this and everything I can find on the topic, but it still doesn’t display the sub page content they way I think it shoul. The pages are using a template for sub pages so I’ve asked the author of the theme (Maranatha) if he has used your plugin successfully.
Just a note, I’ve seen the filter with different code. I’ve tried both with the same result so they may do the same thing. New to WordPress so that figures into it as well.
add_filter( ‘insert_pages_apply_nesting_check’, ‘__return_false’ );
add_filter( ‘insert_pages_apply_nesting_check’, function ( $should_apply ) { return false; } );