Solution:
It seems that RSS feeds are disabled on your site, likely due to a third-party plugin or custom code in your theme.
The code in your attached image resembles what’s described here: How to Disable RSS Feeds in WordPress
.
Check your theme’s functions.php for something like this:
<?php
function wpb_disable_feed() {
wp_die( __('No feed available, please visit our <a href="'. get_bloginfo('url') .'">homepage</a>!') );
}
add_action('do_feed', 'wpb_disable_feed', 1);
add_action('do_feed_rdf', 'wpb_disable_feed', 1);
add_action('do_feed_rss', 'wpb_disable_feed', 1);
add_action('do_feed_rss2', 'wpb_disable_feed', 1);
add_action('do_feed_atom', 'wpb_disable_feed', 1);
add_action('do_feed_rss2_comments', 'wpb_disable_feed', 1);
add_action('do_feed_atom_comments', 'wpb_disable_feed', 1);
?>
Removing or commenting out this code should restore your RSS feeds.