Fatal error: Uncaught TypeError: TUTOR_PREREQUISITES\Prerequisites::get_prerequisite_course_ids(): Argument #1 ($course_id) must be of type int, null given, called in /home/timfauni/public_html/wp-content/plugins/tutor-pro/addons/tutor-prerequisites/classes/Prerequisites.php on line 116 and defined in /home/timfauni/public_html/wp-content/plugins/tutor-pro/addons/tutor-prerequisites/classes/Prerequisites.php:216 Stack trace: #0 /home/timfauni/public_html/wp-content/plugins/tutor-pro/addons/tutor-prerequisites/classes/Prerequisites.php(116): TUTOR_PREREQUISITES\Prerequisites::get_prerequisite_course_ids(NULL) #1 /home/timfauni/public_html/wp-includes/class-wp-hook.php(341): TUTOR_PREREQUISITES\Prerequisites->prereq_redirect(NULL, 9922) #2 /home/timfauni/public_html/wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters('', Array) #3 /home/timfauni/public_html/wp-includes/plugin.php(522): WP_Hook->do_action(Array) #4 /home/timfauni/public_html/wp-content/plugins/tutor/templates/learning-area/index.php(33): do_action('tutor/course/si...', NULL, 9922) #5 /home/timfauni/public_html/wp-includes/template-loader.php(132): include('/home/timfauni/...') #6 /home/timfauni/public_html/wp-blog-header.php(19): require_once('/home/timfauni/...') #7 /home/timfauni/public_html/index.php(17): require('/home/timfauni/...') #8 {main} thrown in /home/timfauni/public_html/wp-content/plugins/tutor-pro/addons/tutor-prerequisites/classes/Prerequisites.php on line 216