During the process of deploying 3scale, new routes are created. If a regular user is being used (instead of a cluster Admin), the installation will fail (even on 2.6 with 'zync').

Hence, we need to make it more clear in the documentation before "oc login":
https://access.redhat.com/documentation/en-us/red_hat_3scale_api_management/2.6/html-single/installing_3scale/index#importing-the-threescale-template