Surely something is wrong on my side. I hesitate to report this as a bug so I'm hitting up the General forum.
Radarr Version 0.2.0.852
nzb360 Version 12.3.2
This hasn't been working for me for a while. If I go to Radarr / Add Movie / search I get
It doesn't matter what I type in the search box, I always get the error. I don't add many movies but when I do I just add it on my Chromebook. It has worked for me in the distant past.
Adding movies through the Discover Movies link seems to work just fine for what it's worth.