"bad digest name" using Angular2 and Json Web Tokens

I am using the repository of the following link:

link

Right after cloning the repository and trying to execute the login I get the error

  

"bad digest name"

That until now I have managed to solve by changing the following lines

export const secret: string = "RbBQqA6uF#ms%F8s7h*?@=95HUm&DGMDd6zLF74XzWQ6dtwXSJwBX#?gL2JWf!";
export const length: number = 128;
export const digest: string = "RbBQqA6uF#msRF8s";

for the following

export const secret: string = "RbBQqA6uF#ms%F8s7h*?@=95HUm&DGMDd6zLF74XzWQ6dtwXSJwBX#?gL2JWf!";
export const length: number = 512;
export const digest: string = "sha512";

After making the change I can "log in" but the value of the token in LocalStorage is undefined and when I try to run the protected API button the console sends the following message:

  

{"message": "Invalid token, please Log in first"}

This is the code of the protected.ts file

import { Router, Response, Request, NextFunction } from "express";
import { verify } from "jsonwebtoken";
import { secret } from "../config";

const protectedRouter: Router = Router();

protectedRouter.use((request: Request & { headers: { authorization: string } }, response: Response, next: NextFunction) => {
    const token = request.headers.authorization;

    verify(token, secret, function(tokenError) {
        if (tokenError) {
            return response.status(200).json({
                message: "Invalid token, please Log in first"
            });
        }

        next();
    });
});

protectedRouter.get("/", (request: Request, response: Response) => {
    response.json({
        text: "Greetings, you have valid token.",
        title: "Protected call"
    });
});

export { protectedRouter }

The code for login.ts below:

import { Router, Request, Response, NextFunction } from "express";
import { randomBytes, pbkdf2 } from "crypto";
import { sign } from "jsonwebtoken";
import { secret, length, digest } from "../config";

const loginRouter: Router = Router();

const user = {
    hashedPassword: "97fe86e10b558f6b0de6b20a4f22fae853bcce13723451999327976a2ca6fa4e7bb554c1cc0f262f8b0caa31ca967761" +
    "a5d283aa140e0b1388dbbcb42d58a07576564eb32cdf9e090820f17b5595a9c50f53b584089cbef4788c088e7fc6181080ec7" +
    "310b08edd3964d1a031aa1730b9d6a5ab91efea70e16350dd92d3f6c69e",
    salt: "joH3RgPYTAgRy/+cBbQGwy26fZE/fmzbmw2/v/DLoJWvF8QAUuzvFFTp9xcvh9BBoxB0E1E6e7bL/Gc4s+aYHCrLwYebXLMx0" +
    "P/VRWTPqvoUe7T1JrzCBdLK5yDvb5Vl2H5oB8hCe/Gb6fLP3/fQM7CKsAQJHJYwq8aj1N7ssjI=",
    username: "john"
};

loginRouter.post("/signup", function (request: Request, response: Response, next: NextFunction) {
    if (!request.body.hasOwnProperty("password")) {
        let err = new Error("No password");
        return next(err);
    }

    const salt = randomBytes(128).toString("base64");

    pbkdf2(request.body.password, salt, 10000, length, digest, (err: Error, hash: Buffer) => {
        response.json({
            hashed: hash.toString("hex"),
            salt: salt
        });
    });
});

// login method
loginRouter.post("/", function (request: Request, response: Response, next: NextFunction) {

    pbkdf2(request.body.password, user.salt, 10000, length, digest, (err: Error, hash: Buffer) => {
        if (err) {
            console.log(err);
        }

        // check if password is active
        if (hash.toString("hex") === user.hashedPassword) {

            const token = sign({"user": user.username, permissions: []}, secret, { expiresIn: "7d" });
            response.json({"jwt": token});

        } else {
            response.json({message: "Wrong password"});
        }

    });
});

export { loginRouter }