Error on lens composition about npm-ramda HOT 7 OPEN

interface Functor<A> {
    fmap<B>(f: ((_: A) => B)): B;
}
type pCoalgebra<A, B> = ((g: A) => Functor<B>);
type Lens<S, T, A, B> = ((f: pCoalgebra<S, T>) => pCoalgebra<A, B>);

const Result = require("folktale/result");
const {lensProp, ifElse, map} = require("ramda");

const regEx = /\(\d{3}\)\s\d{3}-\d{4}/
const validatePhoneNumberString = ifElse(
    (s) => regEx.test(s),
    Result.of,
    () => Result.Error("Invalid Phone Number")
);

const contacts = [
    {name: "Honest Abe", phone: "(123) 456-7890"}, 
    {name: "Bob Fraud", phone: "not my number"}
];

const phoneLens = lensProp("phone");

# Here we apply the Lens directly as a function to lift a functor map 
# from the lens focus to the whole context:
const validateContacts = map(phoneLens(validatePhoneNumberString))

const validatedContacts = validateContacts(contacts);

>>> [
    Result.Ok({ value: { name: "Honest Abe", phone: "(123) 456-7890" } }), 
    Result.Error({ value: "Invalid Phone Number" })
]

/**
 * Returns a lens for the given getter and setter functions. The getter "gets"
 * the value of the focus; the setter "sets" the value of the focus. The setter
 * should not mutate the data structure.
 *
 * @func
 * @memberOf R
 * @since v0.8.0
 * @category Object
 * @typedefn Lens s a = Functor f => (a -> f a) -> s -> f s
 * @sig (s -> a) -> ((a, s) -> s) -> Lens s a
 * @param {Function} getter
 * @param {Function} setter
 * @return {Lens}
 * @see R.view, R.set, R.over, R.lensIndex, R.lensProp
 * @example
 *
 *      var xLens = R.lens(R.prop('x'), R.assoc('x'));
 *
 *      R.view(xLens, {x: 1, y: 2});            //=> 1
 *      R.set(xLens, 4, {x: 1, y: 2});          //=> {x: 4, y: 2}
 *      R.over(xLens, R.negate, {x: 1, y: 2});  //=> {x: -1, y: 2}
 */