Mp3Tag (Mac) having trouble reaching Tag sources

I've had MP3Tag for a while, and I probably haven't used it in about a month. I did update my version to 1.14.0. Today I went to try to tag using Discography and Musicbrainz. In the latter, I get a "HTTP error 503: service unavailable" error. I can access the Musicbrainz website fine. In the former when I use Discography as the tag source, the "Search" button does nothing.

Can anyone advise if there is a known outage, or is there something else I should investigate? If I click "Check for Updates", it just says I'm up to date.

Edit: I've noticed that when I leave the "album" empty and just search based on Artist, it works all the way through.

Thanks for any ideas.

I've tried Discogs and it's working fine here?

As for MusicBrainz, they had difficulties with their search cluster two days aga, but it seems to be working fine again.

Can you try both Tag Sources again?

Thanks, I tried it just now, and it seems it's more consistently working. I noticed the last few days that if I got a 503, I'd just keep trying till it busts through.