Hi @levdev
It seems you were using the wrong name:
<?php if( have_rows('content-section') ): ?>
<?php while ( have_rows('content-section') ) : the_row(); ?>
Could you please change it to the following one?
<?php if( have_rows('content_section') ): ?>
<?php while ( have_rows('content_section') ) : the_row(); ?>
Please notice the underscore (content-section
and content_section
).
I hope this helps 🙂