RSS 2.0 Feed gives 404 error

I am desperate for help and have searched and searched for a solution. I recently moved my blog from New Blogger to www.remarpro.com. Now I’ve “lost” 200 of my subscribers because one of my feeds is giving a 404 error (https://www.absolutelybananas.com/feeds/posts/default?alt=rss).

Other feeds work fine, for example https://www.absolutelybananas.com/feed. I have a feedburner set up(https://feeds.feedburner.com/absolutelybananas), and have the feedsmith plug-in installed.

I have tried:
– searching my files for extra spaces and deleting any that I found.
– de-activating all plug-ins.
– re-downloading the wp-rss2.php file.

So far, nothing has worked. Any ideas?