Roon Won't Play: Pressing Play Button and Nothing happened

Roon remote appears to be functioning normally. I was able to browse my library. I was able to search titles. However, clicking “Play Now” at alnum level or clicking “Play” at track level did nothing. Tracks won’t advance as if it was playing.
Does not appear to be hardware related. Please suggest solution. Thanks. CN
September 1, 2018

Please note the Volume icon flickering siginifying something is happening but the track is not advancing.

Cant see from the picture but do you have a zone or the correct zone selected?
Adding @support so they get notified.

They will need to know your set-up network topology and gear being used (endpoints, computers etc).

Yes, I do. All the zones were selected properly.

Thanks for reaching out, @Chris_Nguyen!

So we can better assist you, please provide a brief description of your current setup using this link as a guide.

Make sure to describe your network configuration/topology, including any networking hardware currently in use, so we can have a clear understanding of how your devices are communicating.

Does this behavior occur with all endpoints?

Can you share a screenshot of the signal path when you’re experiencing this behavior?

Have you tried power cycling your Core machine and networking hardware since noticing this behavior?