Hi, I have installed fresh copy of newsletter like is in the manual shown and create one newsletter and subscription page, now when put e-mail and click submit I get the error

user_error("DataObject::get_by_id passed a non-numeric ID #$id", E_USER_WARNING);

in

Line 2924 of DataObject.php

I did already change the SS_Database line in NewsletterAdmin and I can get to the saved newsletters\

I noticed that when I click subscribe user email appears in Security Panel but this email is not putted into any group. Why it is like this? I did add the newsletter gruop name in newsletter panel and I have this gruop created