Can not convert private key to address

[elvis-hp]

Hi, pls see the photo, I can not convert Private key to address.
I'm using: "litecore-lib": "^0.13.22",

And my codes:
var privateKey = "***"
var litecore = require('litecore-lib');
var address = new litecore.PrivateKey(privateKey).toAddress();
pls help me, thank you so much!

[ultragtx]

Hi @0xngoubou, this issue may be caused by bad npm modules, if you are using yarn, try npm instead.

I've tested on my OSX machine with node 10.8.0, created a new project, npm i litecore-lib, and it works with no issue.

Here's the package-lock.json if you need: package-lock.json.txt

[elvis-hp]

Hi, @ultragtx, thank you for helping me.
But it does not work for. I try: npm i litecore-lib
But it still bugs in bitcore-lib (not litecore-lib)
Before that, I installed and used bitcore-lib. My project supports both BTC and BCH. Now need to add LiteCoin.

[elvis-hp]

new error:

var privateKey = new litecore.PrivateKey();
console.log("privateKey", privateKey);
var address = privateKey.toAddress();
console.log("new address", address);