A template file in a helm chart, like the following was processed by the k8splugin:

1. A comment line
   {{- if .Values.env.someValue }}
   <contents of the resource>

{{- end }}

When the value .Values.env.someValue is false,  the template is rendered to be an empty resource, in this case a file with just the comment line:

1. A comment line

The k8splugin (and presumably the EMCO rsync component also), fails when it attempts to create this component.

See:  DecodeYAML() in src/k8splugin/internal/utils.go