I last chimed in 16 days ago on this issue. I do have a separate ticket about my Roon database crashing and possibly having a bad hard drive in my Intel NUC running ROCK. As part of troubleshooting that issue, I restored my Roon database from a backup onto my old MacBook Pro as the Core. Anyways, just sayin’…I still got the error message “This track is not currently available”. Although, it seems to be happening less often now than it did while running ROCK on the NUC. Interesting.