failure in running the cloudml_train() which was successful before

[snowlover173]

I ran a cloudml_train('training.R',config="config.yml") which successfully ran a few months ago.
This time it gave me the followng error:

Submitting training job to CloudML...

Error: ERROR: gcloud invocation failed [exit status 1]

[command]
/usr/lib/google-cloud-sdk/bin/gcloud --account project-service-account@xxxxx.com --project xxxxx ai-platform jobs submit training cloudml_2020_08_11_xxxxx --job-dir=gs://xxxxx/r-cloudml/staging --package-path=cloudml-model --module-name=cloudml-model.cloudml.deploy --runtime-version=1.9 --region=us-central1 --config=cloudml-model/cloudml.yml -- Rscript

[output]

[errmsg]
ERROR: (gcloud.ai-platform.jobs.submit.training) INVALID_ARGUMENT: Field: runtime_version Error: The specified runtime version '1.9' with the Python version '' is not supported or is deprecated. Please specify a different runtime version. See https://cloud.google.com/ml-engine/docs/runtime-version-list for a list of supported versions

• '@type': type.googleapis.com/google.rpc.BadRequest
  fieldViolations:
  • description: The specified runtime version '1.9' with the Python version '' is
    not supported or is deprecated. Please specify a different runtime version.
    See https://cloud.google.com/ml-engine/docs/runtime-version-list for a list
    of supported versions
    field: runtime_version

Then I passed python version 2.7 and API version 2.1 in the config yml file which passed this error. However, it is not successful anymore and the job failed again.

has there been any change in this library? The program is the exact same one that I ran before.