No info when Finding album arts online with no tags

[xeo]

When there is no Artist in the tags and you use "Finding album arts online" in the ATE, there is no message/info about the lack of appropriate tags to work properly. No cover is added.
https://i.imgur.com/cBtVRbu.gif

[Artem]

What message should be displayed? Online search produces by plugins and scripts, the app doesn't know what fields exactly must be populated

[xeo]

Of course the best results will be when searching for Artist and Title, so it would be best if there was a message like "Artist and Title tags are missing in some files. Add them and try again."
The message would only be displayed if at least one file had no tags, covers would be added to the rest.
And it would be displayed after "This operation will change tags of the audio files. Proceed?" message.