Service Desk setup

I am having a problem enabling Service Desk on GitLab CE 17.0.1

The OS is Rocky Linux 9.2.

I create a project, then go to Setting, General, Service Desk.

All I see is a link to Configure Service Desk

I have followed the link to modify the gitlab.rb file.

Still there is no option to enable Service Desk.

Am I missing something?

Thank you.