There is a resolved post that may hold some more details about your issue.Short story: Disable mod_memcache on your server and see if that fixes the issues.
https://wordpress.org/support/topic/rss-feed-displayed-instead-of-html-page?replies=4
So I have narrowed down my issue a bit. When I have “pretty permalinks” turned on (post_name is what I am using), I intermittently either receive “403 Access Forbidden” errors throughout my site, or some of my pages try opening up in an RSS feed as described above. When I set the permalinks to default, the problem goes away all together. I have had my hosting provider check some of the settings and this is what they have confirmed:
- Mod_Rewrite is enabled on the server.
- FollowSymLinks is on as well.
And this is the current .htaccess file…
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
Does anyone have any insight on how I could fix this?
Right now, I am forced to use the default permalinks for my site, but nearly 90% of all of my links are broken right now because they are pointing towards pages that otherwise had permalinks prior. This is also where my site stands as of right now with the htaccess file.
Options +FollowSymLinks
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress
