Fix errors in BP External Activity
See BP External Activity errors listed here:
Updated by Raymond Hoh about 10 years ago
See commit c1e699e.
The fetch_feed() function uses a new filepath reference (feed.php). Also, I've switched out the deprecated
get_userdatabylogin() call with
Lastly, I've added an empty check for $_POST['group_id'] in the AJAX function.
I believe these should fix these notices and errors.