Fatal error: Uncaught Error: Call to undefined function learndash_get_course_id()
in /storage/www/edu.vspu.ru/wp-content/themes/supportdesk/functions.php on line 596

Стек вызовов:

1. current_user_has_access_to_course()
   wp-content/themes/supportdesk/functions.php:757
2. my_course_join()
   wp-includes/class-wp-hook.php:298
3. WP_Hook::apply_filters()
   wp-includes/class-wp-hook.php:323
4. WP_Hook::do_action()
   wp-includes/plugin.php:515
5. do_action_ref_array()
   wp-includes/class-wp.php:746
6. WP::main()
   wp-includes/functions.php:955
7. wp()
   wp-blog-header.php:16
8. require()
   index.php:17