I have a similar problem. It also started this morning. Tracks are simply not playing. When you click play, it freezes and does not start the song. I have QNAP TS251+ NAS, 8GB memory, Roon db on a USB attached solid state drive, linked to a TP link network switch, ethernet to a Devialet 220 Expert Pro. I have a 200mbps fiber line. Its been like this the whole day
Just for confirmation. I disabled and re-enabled the zone and all was good after that.
I am sorry for getting back to you this late - I wish it was going to be sooner.
I cannot thank you enough for trying and actually succeeding to resolve this issue while we got a chance to reply.
I hope the victory was not temporary