The second point under Logging to the Argo CD is not matching with the UI. It says to navigate to menu - Application Stages - Argo CD. 

In the GUI it is menu - OpenShift Gitops - Argo CD

Find in the link below:

https://docs.openshift.com/container-platform/4.8/cicd/gitops/configuring_argo_cd_to_recursively_sync_a_git_repository_with_your_application/configuring-an-openshift-cluster-by-deploying-an-application-with-cluster-configurations.html#logging-in-to-the-argo-cd-instance-by-using-your-openshift-credentials_configuring-an-openshift-cluster-by-deploying-an-application-with-cluster-configurations