Permission denied when accessing icr.io/zoscp/ibmjava

[Crosswind]

When trying to build the image zOS-Container-Platform/multi-architecture-images/basic-image-building using the z/OS base image I receive an HTTP 403 response from the registry.

Steps to reproduce:

• Login to IBM Cloud ibmcloud login -a https://cloud.ibm.com -u passcode -p <passcode
• Add credentials to Docker daemon ibmcloud cr login --client docker
• Pull the image:

> docker image pull icr.io/zoscp/ibmjava:8
Error response from daemon: failed to resolve reference "icr.io/zoscp/ibmjava:8": unexpected status from HEAD request to https://icr.io/v2/zoscp/ibmjava/manifests/8: 403 Forbidden

Why is this happening?

Where can I find more information about the zoscp images that are available? I tried finding images but didn't get any result back:
> ibmcloud cr image-list --include-ibm | grep "zoscp"