Issue:
There is currently an issue with the Certificate Module which prevents reporting
Certificate Issues by group. Cannot filter Certificate issues by group in
report correctly.

Suggested Code Modification:

Line 545 of mod/certificate/lib.php

• foreach($groupusers as $id => $gpuser) {
• if (!isset($users[$id])) { - //remove this user as it isn't in the group! - unset($users[$id]); - }
• }

+ foreach($users as $user){ //remove this user as it isn't in the group! + if(!array_key_exists($user->id, $groupusers)) + unset($users[$user->id]); +}