Thank you for your reply. Firewall is snoozed in McAfee and off in Windows Defender. But the problem persists.
However, when I stream through my Marantz pre amp today I get sound. But I had a problem with the Marantz too yesterday but I since I use the Oppo predominantly I mentioned it in my query. Playlist too is not showing up in the Core.
Please advise me on what else I can do to rectify the problem.