I tried this. And i tgried to connect to an other internet provider. Same problem 
Which could mean that you have problems in the router configuration?
Where did you find the mp3tag.cfg file?
... \AppData\Roaming\Mp3tag\
Can you try again? There was an issue with Hetzner Cloud tonight and I've just rebooted the Discogs image cache server.
Thanks a lot
Happy it's back working and thanks for reporting!
Hijacking this thread, because this has also happened to me yesterday. I was in the middle of tagging when suddenly Discogs stopped fetching images. I tried with dozens of albums, all of which have Covers on their Discogs site, but none gets shown anymore. The covers on MusicBrainz still work, however...
Can anyone confirm this or is it just on my end? Thanks a lot.
Yes, Discogs changed their image URLs which broke my caching server. I've now implemented a matching resolver and things should be back to normal.
Yep, seems to be working now again. Thank you for the quick fix.

