Omnibus Mattermost on separate server - unable to disable GitLab

Thanks for the reply, I'll give that a go and see, I still get the --version error. (I'm away from the console at the moment, I'll update with the actual error.) Should I have a number of sidekiq processes, 25, if GitLab itself is disabled on the Mattermost box? I have OAuth set to query the Gitlab server for user access.