Is that the only place a ' error occurs?
Either way, fix it by changing this (in uttstore/action.denyforumaccess.php):
PHP Code:
uttstore_add_history($action['actionid'], $action['cost'], $userdiscount, $action['tax'], $totalcost, $_REQUEST['userid'], '0', $forum['title']);
To this:
PHP Code:
uttstore_add_history($action['actionid'], $action['cost'], $userdiscount, $action['tax'], $totalcost, $_REQUEST['userid'], '0', addslashes($forum['title']));
EDIT: Fixed all instances of this locally. The fixes will be in the next release.