message: Object may not have extensions
diff: @@ -13,7 +13,7 @@ module.exports = (err = {}) => {
  return err.graphQLErrors.reduce((memo, gqlErr = {}) => {
  // If an attribute is present,
  // return the message keyed by that attribute
  - if (gqlErr.extensions.attribute) {
  + if (gqlErr.extensions && gqlErr.extensions.attribute) {
  return {
  ...memo,
  attributeErrors: {
  