Fernando, reason of error that manifest is not found, because in your variables just missed one '/' this is a link that we have as result in article https://raw.githubusercontent.com/kubeflow/manifestsv1.2-branch/kfdef/kfctl_k8s_istio.v1.2.0.yaml , but this is how it must be: https://raw.githubusercontent.com/kubeflow/manifests/v1.2-branch/kfdef/kfctl_k8s_istio.v1.2.0.yaml