Add quick switch task assignee?

Hello,

I do not have this option that interests me. To right click and quickly assign a task to a person.
How do you activate it?

“Add quick switch task assignee feature (#3251) (#3177)”

Thank you

Kanboard version: 1.2.18
Database type and version: 10.3.17-MariaDB
PHP version: 7.2.24
OS: Linux CentOs 8
Browser: Chrome, Firefox