Error ERR_INVALID_ARG_TYPE when sending message from Viber bot to botbuilder-viber

Problem in npm-module

https://www.npmjs.com/package/botbuilder-viber

Platform

Operating System: Ubuntu

Node Version: 9.3.0

NPM Version: 5.5.1.

Code

var viber = require('botbuilder-viber');
var express = require('express');
var bodyParser = require('body-parser');

var viberOptions = {
  Token: '***',
  Name: '***',
  AvatarUrl: '***'
}
var viberChannel = new viber.ViberEnabledConnector(viberOptions);

var expressApp = express();

expressApp.listen(process.env.port || process.env.PORT || 3978, function() {
    console.log("Express server is running.");
});

expressApp.use(bodyParser.urlencoded({ extended: false }));

expressApp.use(bodyParser.json());

bot.connector(viber.ViberChannelId, viberChannel);

expressApp.use('/viber/webhook', viberChannel.listen());

Expected Behavior

No error

Actual Behavior

Error (repeats twice everytime) when I sending message from my viber bot.

TypeError [ERR_INVALID_ARG_TYPE]: The "data" argument must be one of type string, TypedArray, or DataView at Hmac.update (internal/crypto/hash.js:53:11) at MessageValidator._calculateHmacFromMessage (/app/node_modules/viber-bot/lib/message/message-validator.js:17:54) at MessageValidator.validateMessage (/app/node_modules/viber-bot/lib/message/message-validator.js:11:30) at _app.use (/app/node_modules/viber-bot/lib/middleware.js:61:32) at Layer.handle [as handle_request] (/app/node_modules/express/lib/router/layer.js:95:5) at trim_prefix (/app/node_modules/express/lib/router/index.js:317:13) at /app/node_modules/express/lib/router/index.js:284:7 at Function.process_params (/app/node_modules/express/lib/router/index.js:335:12) at next (/app/node_modules/express/lib/router/index.js:275:10) at textParser (/app/node_modules/body-parser/lib/types/text.js:60:7) at Layer.handle [as handle_request] (/app/node_modules/express/lib/router/layer.js:95:5) at trim_prefix (/app/node_modules/express/lib/router/index.js:317:13) at /app/node_modules/express/lib/router/index.js:284:7 at Function.process_params (/app/node_modules/express/lib/router/index.js:335:12) at next (/app/node_modules/express/lib/router/index.js:275:10) at expressInit (/app/node_modules/express/lib/middleware/init.js:40:5) at Layer.handle [as handle_request] (/app/node_modules/express/lib/router/layer.js:95:5) at trim_prefix (/app/node_modules/express/lib/router/index.js:317:13) at /app/node_modules/express/lib/router/index.js:284:7 at Function.process_params (/app/node_modules/express/lib/router/index.js:335:12) at next (/app/node_modules/express/lib/router/index.js:275:10) at query (/app/node_modules/express/lib/middleware/query.js:45:5) at Layer.handle [as handle_request] (/app/node_modules/express/lib/router/layer.js:95:5) at trim_prefix (/app/node_modules/express/lib/router/index.js:317:13) at /app/node_modules/express/lib/router/index.js:284:7 at Function.process_params (/app/node_modules/express/lib/router/index.js:335:12) at next (/app/node_modules/express/lib/router/index.js:275:10) at Function.handle (/app/node_modules/express/lib/router/index.js:174:3)

Solution

I added bodyparser only to specific routes, after this connector starts to work.