The release issue
The artist name on the release and the artist name that you have on your cover art doesn't match. They must match.
It might sound picky but the artist name on the cover and the artist name of the release has to match exactly. No variation or slight tweak.
Take the example below:
How can I fix the issue?
Easy. Either amend the artist name on the cover art, or remove it completely as you don’t have to have your artist name on your cover art.