If the Wallboard is used, at least one Live Agent Dashboard Administrator needs to be defined.
Wallboard
Only the Live Agent Dashboard Administrator can filter data based on Call Center, queue and agents.
Setup / Object Manager / User / User Page Layouts
Add the field: Live Agent Dashboard Administrator
Setup / users / user
Check the option: Live Agent Dashboard Administrator
The Live Agent Dashboard Administrator must be added to a Call Center with a Live Agent status configuration.