For those that may still be having problems with the feed issue, here’s what I did to fix the problem.
The RSS link in my client’s Meta section read:
url/feed/
This is what works.
In his footer.php file he had a old feed url that read:
url/wp-rss.php
Deleting this second, older feed as described above did not fix the issue.
In his template>footer.php file I changed this:
url/wp-rss.php
to this:
url/feed/
and it now works properly.
I’m not certain if other templates are set up the same, but it may be worth a shot.
Good Luck!