Can you SSH into your Snakeoil Player, and run the following command?
cat /opt/RoonBridge/VERSION
The latest version should be:
100700571
1.7 (build 571) stable
If you're not running this version, upgrade it. I forgot you cannot uninstall the software if it's active, so here're the instructions (I'll also update the post above). Note your Snakeoil PC needs an Internet connection to reinstall RoonBridge.
1. Go to music players menu, select another player other than RoonBridge (e.g. Squeezelite)
2. Go to the Snakeoil menu, uncheck RoonBridge. Hit "Save"..
3. And Check RoonBridge again.