I'm sorry to report that I get the same message when I search with label and catalog using cbs&catno=CK 38243. Previously I tried Search by Album(Artist) + Title and that also gave the same message.
Today I tried the Tag Source discogs that I believe is a default with Mp3tag. When I click on Tag Sources, it is the entry below Cover Art. It has the album title, I click Next, and have a list of albums. I select the one with the correct year, 1983, format, CD, and company, CBS. There are two in the list, and the second one is for release ID 721701. I click next and the script is able to retrieve information from discogs for release ID 721701. Maybe this script works because it doesn't retrieve as much information from discogs as the pone scripts do. I'll probably use this script and manually add/modify tag information for this album.
Thanks for looking into it.