WordPress Speed Up Service | WordPress Website Maintenance Packages Reply To: rss feed not valid, by James Huff Copying the file here will remove a lot, so that’s not the right way to go about this. The extra whitespace will be on line 6 of your copy of that file. You can compare it to a fresh file from a fresh download at https://wordpress.org/download/ or better yet, just delete and replace your file with the fresh copy. Reply To: rss feed not valid