apiVersion field missing error in OpenShift

If you are running into the following error message in OpenShift when processing a YAML template:

error: unable to get type info from the object “*unstructured.Unstructured”: Object ‘apiVersion’ is missing in ‘object has no apiVersion field’

The cause is a problem with the apiVersion field in the template — even if it is present; the error message is misleading.

-kind: ImageStream
  apiVersion: 1 # Incorrect, must be v1

The apiVersion value must be v1 instead of 1.