No sound in Cubase 10 pro

I upgrade to Cubase 10 Pro today. And I opened a project created in Cubase 9 pro. There is no sound at all. I believe it is not related to the ASIO driver selection because when playing back a audio, the meter of the channel does not show any level.

There is a snapshot in the attachment. I was playing back the track and loop a section of it. There is no sound from any tracks.

Your AUDIO CONNECTIONS need to be established/setup/re-established.