ChatOps: describe project name or alias parameter

The ChatOps documentation needs to describe what is meant by "[project name or alias]". I tried to use the route, like "example/subgroup/my-project", and just the project name, like "my-project". But, it always says

GitLab error: project or alias not found

There's no information on acceptable project names or what an alias is (is that a gitlab.com thing or a Slack thing) or how to set one.

https://docs.gitlab.com/ee/ci/chatops/

Edited by Ghost User