Having difficulties enabling backups with MongoDB Operator 1.10 (header errors)

I have the same error when run backup command
kubectl apply -f backup/backup.yaml

Here is my cr.yaml on storages section

backup:
    enabled: true
    restartOnFailure: true
    image: percona/percona-server-mongodb-operator:1.10.0-backup
    serviceAccountName: percona-server-mongodb-operator
#    resources:
#      limits:
#        cpu: "300m"
#        memory: "0.5G"
#      requests:
#        cpu: "300m"
#        memory: "0.5G"
    storages:
      s3-us-west:
        type: s3
        s3:
          bucket: mongodbs-backup-test
          credentialsSecret: mongodbs-backup-s3
          region: us-west-2
          prefix: ""

and here is secrete config file

apiVersion: v1
kind: Secret
metadata:
  name: mongodbs-backup-s3
type: Opaque
data:
  AWS_ACCESS_KEY_ID: <MY BASE64 ENCODED KEY>
  AWS_SECRET_ACCESS_KEY: <MY BASE64 ENCODED KEY>
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