I'm having still the following problems. I read the forum and did all I could find. (Like: "Steps to create/migrate and authorize new Facebook channels" and I got new tokens. And I tried to set deprecate offline_access, but there is only deny offline_access, which I enabled in advanced settings in FaceBook developers. I did Authorize application and grant permissions).
In the Autotweet Manager - Add Channel screen, after selecting a facebook account, the field "facebook channels" gets stuck with the message "...requesting facebook data...".
Joomla 1.5.18 (I am stuck to 1.5...)
Content-Extension Pro 1.9