Index: moodle/mod/lamslesson/lib.php
===================================================================
diff -u -rbb31283092c745d83ddc0cb528d2c05f890c7870 -r195c919f7206332ce1522196c8ac509c3ae128ab
--- moodle/mod/lamslesson/lib.php	(.../lib.php)	(revision bb31283092c745d83ddc0cb528d2c05f890c7870)
+++ moodle/mod/lamslesson/lib.php	(.../lib.php)	(revision 195c919f7206332ce1522196c8ac509c3ae128ab)
@@ -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);