Fatal error: Uncaught Error: Call to undefined method TUTOR\Utils::course_sub_pages() in /home/customer/www/techlab.ptllc.org/public_html/wp-content/themes/geeks/inc/tutor/geeks-tutor-template-functions.php:126 Stack trace: #0 /home/customer/www/techlab.ptllc.org/public_html/wp-includes/class-wp-hook.php(307): geeks_tutor_default_course_tabs(Array) #1 /home/customer/www/techlab.ptllc.org/public_html/wp-includes/plugin.php(191): WP_Hook->apply_filters(Array, Array) #2 /home/customer/www/techlab.ptllc.org/public_html/wp-content/themes/geeks/inc/tutor/functions/single-course.php(31): apply_filters('geeks_tutor_cou...', Array) #3 /home/customer/www/techlab.ptllc.org/public_html/wp-content/themes/geeks/inc/tutor/functions/single-course.php(11): geeks_tutor_get_single_course_tabs() #4 /home/customer/www/techlab.ptllc.org/public_html/wp-content/themes/geeks/tutor/single-course.php(16): geeks_tutor_get_single_course_data() #5 /home/customer/www/techlab.ptllc.org/public_html/wp-includes/template-loader.php(106): include('/home/cus in /home/customer/www/techlab.ptllc.org/public_html/wp-content/themes/geeks/inc/tutor/geeks-tutor-template-functions.php on line 126