6000mk2 + MacOs Catalina - NO sound in Serato pro

Hi everyone! I have MacBook Pro 2015 with macOS Catalina 10.15.7 and mc6000mk2 controller + latest version (2.4.6) Serato pro. MIDI - everything is ok. But no sound at master out, no sound headphones(( What’s the problem I have?

Was it working before?