Assignment rule: None not found

Frappe Helpdesk
1

When I try to add an agent to a group from the desktop or the helpdesk app, I get this error:
Assignment rule: None not found
The resource you are looking for is not available.

I’ve already checked and added the agent to the assignment rule, but I’m still getting the error.

HELP

2

On which page you are getting this error

Share how your team looks like, in HD Team doctype
and share the assignment rule linked to the HD Team doctype