Fatal error: Uncaught TypeError: TUTOR\Course_List::is_public(): Argument #1 ($course_id) must be of type int, null given, called in /var/www/ammenet.dk/public_html/wp-content/plugins/tutor/templates/learning-area/index.php on line 37 and defined in /var/www/ammenet.dk/public_html/wp-content/plugins/tutor/classes/Course_List.php:494 Stack trace: #0 /var/www/ammenet.dk/public_html/wp-content/plugins/tutor/templates/learning-area/index.php(37): TUTOR\Course_List::is_public(NULL) #1 /var/www/ammenet.dk/public_html/wp-includes/template-loader.php(132): include('/var/www/ammene...') #2 /var/www/ammenet.dk/public_html/wp-blog-header.php(19): require_once('/var/www/ammene...') #3 /var/www/ammenet.dk/public_html/index.php(17): require('/var/www/ammene...') #4 {main} thrown in /var/www/ammenet.dk/public_html/wp-content/plugins/tutor/classes/Course_List.php on line 494