[SOLVED] [V7] - Live Update & Who is Viewing not working

After i upgrade from V6 to V7, ERPNext no longer display “XXX is viewing this document” when 2 users are viewing it at the same time. Is the feature removed?

Not Removed, works perfectly fine on my instance.

Latest screenshot as follows:

Maybe checkout failed dependencies during setup/upgrade

thanks! Got it working now, seems my socketio failed to start earlier due to memory issues.