Userportal: Fix php warnings

main/inc/lib/sessionmanager.lib.php

@@ -3917,7 +3917,7 @@ class SessionManager
         $tbl_course = Database::get_main_table(TABLE_MAIN_COURSE);
         $tbl_session_rel_course = Database::get_main_table(TABLE_MAIN_SESSION_COURSE);
         $session_id = (int) $session_id;
-        $sqlSelect = '*, c.id, c.id as real_id';
+        $sqlSelect = '*, c.id, c.id as real_id, c.code as course_code';
 
         if ($getCount) {
             $sqlSelect = 'COUNT(1) as count';

main/inc/lib/usermanager.lib.php

@@ -3576,7 +3576,7 @@ class UserManager
             if (empty($checkPosition)) {
                 // The session course list doesn't have any position,
                 // then order the course list by course code
-                $list = array_column($myCourseList, 'code');
+                $list = array_column($myCourseList, 'course_code');
                 array_multisort($myCourseList, SORT_ASC, $list);
             }
         }