Index: moodle/mod/lamslesson/lib.php
===================================================================
diff -u -r21551459eaad20bbdbb917899a6e6675f2423e7f -r4e45e646c2cf4a86aab48f94aba199d66ad9beba
--- moodle/mod/lamslesson/lib.php	(.../lib.php)	(revision 21551459eaad20bbdbb917899a6e6675f2423e7f)
+++ moodle/mod/lamslesson/lib.php	(.../lib.php)	(revision 4e45e646c2cf4a86aab48f94aba199d66ad9beba)
@@ -769,7 +769,7 @@
 	}
 	
 	// we are looking for all users assigned in this context or higher
-	if ($usercontexts = get_parent_contexts($context)) {
+	if ($usercontexts = $context->get_parent_context_ids($context)) {
 		$listofcontexts = '('.implode(',', $usercontexts).')';
 	} else {
 		$sitecontext = get_context_instance(CONTEXT_SYSTEM);