RSS not working with HTTPs

I’ve recently installed an SSL certificate, and made all the appropriate changes. Http to https in the admin>settings>general page, added the scripts in the wp-config file:

define(‘FORCE_SSL’, true);
define(‘FORCE_SSL_ADMIN’,true);

and rules in htaccess

RewriteEngine On
RewriteCond %{HTTPS} !=on
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

Then someone told me that the RSS was down. My feed (https://www.thepiratescove.us/?feed=rss2) will not show any post beyond one that says “We don’t deny Harvey….”, despite having several more posts up. I’ve even tried adding

RewriteCond %{REQUEST_URI} !/feed [NC]

to the htaccess file, which supposedly excludes RSS from the https rules, as I’ve read that some certificates (mine is through Let’s Encrypt) can cause issues.

Anyone have any ideas? I’m at a loss at this point.

The page I need help with: [log in to see the link]