Fatal error: Uncaught TypeError: TUTOR\Course_List::is_public(): Argument #1 ($course_id) must be of type int, null given, called in /customers/1/7/4/marcellavalentina.com/httpd.www/wp-content/plugins/tutor/templates/learning-area/index.php on line 37 and defined in /customers/1/7/4/marcellavalentina.com/httpd.www/wp-content/plugins/tutor/classes/Course_List.php:494
Stack trace:
#0 /customers/1/7/4/marcellavalentina.com/httpd.www/wp-content/plugins/tutor/templates/learning-area/index.php(37): TUTOR\Course_List::is_public(NULL)
#1 /customers/1/7/4/marcellavalentina.com/httpd.www/wp-includes/template-loader.php(132): include('/customers/1/7/...')
#2 /customers/1/7/4/marcellavalentina.com/httpd.www/wp-blog-header.php(19): require_once('/customers/1/7/...')
#3 /customers/1/7/4/marcellavalentina.com/httpd.www/index.php(17): require('/customers/1/7/...')
#4 {main}
  thrown in /customers/1/7/4/marcellavalentina.com/httpd.www/wp-content/plugins/tutor/classes/Course_List.php on line 494