RSS feed linking to ftp file download

I have the following problem with my RSS feed:
For some reason it got linked to ftp access to an mp3 file I uploaded recently to my wp-content/uploads/ folder. When I clicked on the RSS feed, it would ask me for a password for ftp access to my site and when provided, would start downloading the mp3 file. I removed the file and now when I click on my RSS I am being asked again for the password and when I enter it, the following message appears: “550 Can’t change directory to /public_html/wp-content/uploads/2010/03/01_01_Faintest_Of_Sparks.mp3: No such file or directory”

The same thing happens with my comments RSS feed.

I have another blog on the same site, https://www.blog.svobodnablogaria.com, which uses the same theme and works ok.

My website is: https://www.svobodnablogaria.com

I don’t remember doing anything that would have caused this and have no idea how to resolve it.

Can someone please help?

Many thanks,

Stefan