I have set up two VM's, one is the musicbrainz-server VM and the other is an Ubuntu machine containing Picard.

Both machines are only connected to each other, and not to the internet.

When clicking 'Lookup' in Picard, I get the following error in the terminal:

Error downloading http://192.168.56.3:8080/ws/2/recording?query=qdur%3A%2884%29%20track%3A%28anna%20meredith%20%5C-%20shill%29&limit=25 - server replied: Unknown resource type none (QT code 299, HTTP code 400)'