Mood "Now Playing" song info temporarily unavailable — problem is on Mood's servers, not your receiver
Before anyone reflashes an image or reinstalls the plugin: this is not a problem with your receiver, your image, or the plugin.
The plugin gets its song data from Mood Media's public "What's Playing Now" feed at muzakwpn.muzak.com. That site sits behind Cloudflare, and Cloudflare is currently returning Error 526 — Invalid SSL Certificate, which means the security certificate on Mood's own web server has expired or become invalid. Hopefully Mood will update the certificate...