No secondary title with LearnPress plugin

Nice plugin!

The problem I have, it works in post title of the theme, but not within the LearnPress plugin.

It works within the lesson/quiz content of the Learnpress plugin when I add the shortcode [secondary_title], but again not in the title.

I tried to add the shortcode and php code in the lesson/quiz title.php file, no luck!

<?php echo do_shortcode(“[secondary_title]”); ?>
and
get_secondary_title($post_id, $before, $after, $use_settings)

The website is on a localhost for now, so I can’t send you a link. But I would appreciate any suggestions or help!

Thanks