Serviio

NAS213 tried to update from 1.9.0 to 1.9.1, first attempt complained dejavu font couldn't download, then manually downloaded and put in public folder and tried update again, complained 'port 23413 conflict with others' (something like this cannot remember exactly the port number), went back to package center and found Serviio disappeared, so tried to install again, now 'port undefined conflict with other services blah blah'. Rebooted NAS and tried again, same error. Totally stuck. What can I do now?

I've hit this exact issue. Stopped all other packages, rebooted, run command line to see what ports in use, no joy so far. Error says port undefined.

Fixed, delete this file: /usr/local/etc/services.d/Serviio.sc