freenas-provisioner: Invalid character 'E' looking for beginning of value

If I set the ‘host’ portion of secret.yml to a base64 of an IP address or a DNS hostname, I get this issue in the logs:

kubectl -n kube-system logs -f freenas-nfs-provisioner-5559b967df-js7sb

I0114 21:55:22.266603       1 controller.go:926] provision "default/freenas-test-pvc" class "freenas-nfs": started
I0114 21:55:22.271765       1 event.go:221] Event(v1.ObjectReference{Kind:"PersistentVolumeClaim", Namespace:"default", Name:"freenas-test-pvc", UID:"a2d0a669-1846-11e9-b420-000c29289e1c", APIVersion:"v1", ResourceVersion:"10976528", FieldPath:""}): type: 'Normal' reason: 'Provisioning' External provisioner is provisioning volume for claim "default/freenas-test-pvc"
W0114 21:55:22.310721       1 dataset.go:60] invalid character 'E' looking for beginning of value
W0114 21:55:22.310772       1 controller.go:685] Retrying syncing claim "default/freenas-test-pvc" because failures 14 < threshold 15
E0114 21:55:22.310798       1 controller.go:700] error syncing claim "default/freenas-test-pvc": failed to provision volume with StorageClass "freenas-nfs": invalid character 'E' looking for beginning of value
I0114 21:55:22.310998       1 event.go:221] Event(v1.ObjectReference{Kind:"PersistentVolumeClaim", Namespace:"default", Name:"freenas-test-pvc", UID:"a2d0a669-1846-11e9-b420-000c29289e1c", APIVersion:"v1", ResourceVersion:"10976528", FieldPath:""}): type: 'Warning' reason: 'ProvisioningFailed' failed to provision volume with StorageClass "freenas-nfs": invalid character 'E' looking for beginning of value