diff --git a/lib/classes/MyRealmModel.php b/lib/classes/MyRealmModel.php
index d905ca9b5f79bc6d1a26c6eb4da2f3fccb2159f3..5a6c67b104947646e09cb6d5d43609a40d16e524 100644
--- a/lib/classes/MyRealmModel.php
+++ b/lib/classes/MyRealmModel.php
@@ -937,7 +937,7 @@ class MyRealmModel
     {
         $default_modules = [];
         if ($range_type === 'course') {
-            $sem_class = SemClass::getClasses()[1];
+            $sem_class = array_values(SemClass::getClasses())[0] ?? SemClass::getDefaultSemClass();
         } else {
             $sem_class = SemClass::getDefaultInstituteClass(1);
         }