The newsletter module seems to stop working since Silverstripe upgraded to version 2.3.4. With 2.3.5, the module still doesn't work. Here is the error it displays:
[Warning] Invalid argument supplied for foreach()
GET /ahon/mailing-list-subscription/
Line 262 in C:\wamp\www\ahon\newsletter\code\SubscribeForm.php
Anyone have an idea? Thanks@