Google search doesn't seem to have heard of this error, but I'm unable to escape it:
ERROR: (gcloud.preview.app.deploy) Server responded with code [400]:
Bad Request Unexpected HTTP status 400.
Failed Project Preparation (app_id='s~rrowland-test-project-2').
Error "Failed to provision bridges." during VmProvisionBridges.
I have followed the instructions at https://cloud.google.com/appengine/docs/managed-vms/nodejs/hello-world exactly. I have tried new projects. I've tried clearing out the VM buckets.
This appears during the deploy process after running
gcloud preview app deploy
From the sample app's root directory:
nodejs-docs-samples/appengine/hello-world