Inspect the details of the modelops-server pod. For example, if your Kubernetes namespace for ModelOps is named 'modelops', run:
kubectl describe pod modelops-server -n modelops
The output will include details that help identify the issue, which is a missing Kubernetes secret in this case:
Warning Failed 18m (x10 over 20m) kubelet Error: secret "modelops-server" not found
The solution is to simply create the secret:
kubectl create secret generic modelops-server --from-literal=admin=<MODELOPS_ROOT_PASSWORD>
..where you can choose the value for <MODELOPS_ROOT_PASSWORD>.