My mistake, I had this in my functions and it was causing 404 on RSS feeds because Author pages are turned off.
/* 404 on author pages */
add_filter( 'author_link', 'no_author_link' );
function no_author_link() {
global $wp_query;
$wp_query->set_404();
status_header(404);
nocache_headers();
include( get_404_template() );
exit;
}
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This reply was modified 7 years, 8 months ago by dfterry.