Dear Kenzo @itthinx,
I have an issue when Groups is activated - Subscribe2 sends an empty post body, even when testing all components as an administrator. Posts are made via email using Postie, but that works fine with Subscribe2 if Groups is deactivated.
I have been working this issue through on the Subscribe2 support forum with that plugin's author Matty Robinson - see that story here if required:
@Mattyrob 's estimation of the problem is this:
I think it must be something to do with the user data being available in both plugins then.
Postie seems to be setting it up correctly in the wp_get_current_user() function. But the Group function user_can_read_post() is not collecting the same or a valid user ID when it is called in the_content filter.
You need to try and debug what is set and collected in those functions on your site.
It hard to say what needs to be done just looking at the code but as a guess I think maybe some variables need 'globalled' before being populated.
My issue is I am not a developer so need some help with debugging. Would you possibly be able to help please? I have purchased some of your plugins via Codecanyon, for this same site.