This particular workshop chart works with the iac-rhoai-on-cloud-services repository.
It will need to be configured differently. Locate the following file in the repository. ansible/roles/create_workshop/tasks/main.yaml and set the Workshop task to match the following.
Follow the rest of the instructions from iac-rhoai-on-cloud-services.
- name: Workshop
...
vars:
...
workshop:
chart:
name: "rhoai-devex-mobb" # Set the base chart name
repo: "https://poc-examples.github.io/workshops" # Use the poc-examples hosted workshop charts
version: "0.1.16" # Current version is 0.1.16
enabled: true

Logging to OpenShift using the provided link and the set CLUSTER_USERNAME & CLUSTER_PASSWORD.