Edit "tiki-newsletters.php
Change line 11 to read
if ( !isset( $_REQUEST["unsubscribe"] ) ){ $access->check_permission('tiki_p_list_newsletters'); }
Change line 37 to read
if (!$user && $tiki_p_subscribe_newsletters != 'y' && !isset($_REQUEST["confirm_subscription"]) && !isset($_REQUEST["unsubscribe"])) {
I have attached an updated tiki-newsletters.php file.
To help developers solve the bug, we kindly request that you demonstrate your bug on a show2.tiki.org instance. To start, simply select a version and click on "Create show2.tiki.org instance". Once the instance is ready (in a minute or two), as indicated in the status window below, you can then access that instance, login (the initial admin username/password is "admin") and configure the Tiki to demonstrate your bug. Priority will be given to bugs that have been demonstrated on show2.tiki.org.