Fixing Fatal Error when no course is defined -refs BT#16569

main/lp/learnpath.class.php

@@ -4634,6 +4634,7 @@ class learnpath
 
         $course = $courseRepo->find($courseId);
 
+	if ($courseId!=0) {
             // Subscribed groups to a LP
             $subscribedGroupsInLp = $itemRepo->getGroupsSubscribedToItem(
                 TOOL_LEARNPATH_CATEGORY,
@@ -4641,6 +4642,7 @@ class learnpath
                 $course,
                 $session
             );
+        }
 
 	if (!empty($subscribedGroupsInLp)) {
             $noGroupSubscribed = false;