Fix description list from session course - refs BT#14289

main/course_description/course_description_controller.php

@@ -37,8 +37,8 @@ class CourseDescriptionController
         $course_description = new CourseDescription();
         $session_id = api_get_session_id();
         $data = [];
-        $course_description_data = $course_description->get_description_data();
         $course_description->set_session_id($session_id);
+        $course_description_data = $course_description->get_description_data();
         $data['descriptions'] = isset($course_description_data['descriptions']) ? $course_description_data['descriptions'] : '';
         $data['default_description_titles'] = $course_description->get_default_description_title();
         $data['default_description_title_editable'] = $course_description->get_default_description_title_editable();