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Fatal error: Uncaught Error: Call to undefined function learn_press_is_support_course_item_type() in /home/p22849/club.dv-tandem.ru/wp-content/plugins/learnpress/inc/custom-post-types/abstract.php:835 Stack trace: #0 /home/p22849/club.dv-tandem.ru/wp-content/plugins/learnpress/inc/custom-post-types/course.php(224): LP_Abstract_Post_Type->_filter_items_by_course() #1 /home/p22849/club.dv-tandem.ru/wp-includes/class-wp-hook.php(326): LP_Course_Post_Type->_posts_where_paged_course_items(' AND wp9r_posts...') #2 /home/p22849/club.dv-tandem.ru/wp-includes/plugin.php(256): WP_Hook->apply_filters(' AND wp9r_posts...', Array) #3 /home/p22849/club.dv-tandem.ru/wp-includes/class-wp-query.php(2932): apply_filters_ref_array('posts_where_pag...', Array) #4 /home/p22849/club.dv-tandem.ru/wp-includes/class-wp-query.php(3949): WP_Query->get_posts() #5 /home/p22849/club.dv-tandem.ru/wp-includes/class-wp.php(701): WP_Query->query(Array) #6 /home/p22849/club.dv-tandem.ru/wp-includes/class-wp.php(821): WP->query_posts() #7 /home/p22849/club. in /home/p22849/club.dv-tandem.ru/wp-content/plugins/learnpress/inc/custom-post-types/abstract.php on line 835