Can't get multi-project pipeline to work

I am trying EE hosted by The multi-project pipeline trigger syntax in the demo is simple, however, I can’t get it work. Is there anything else other than .gitlab-ci.yml need to set? The pipeline only shows red for that stage, no error message…Can’t get “token=$CI_JOB_TOKEN” to work either.

stage: trigger-cross-projects
ENVIRONMENT: ‘run test’
trigger: me/myrepo