RPC XDC Network

Can you once try this and see if it solves your issue.

For websocket :

const Xdc3 = require("xdc3");
let provider = new Xdc3.providers.WebsocketProvider('wss://ws.apothem.network/ws');
let xdc3 = new Xdc3(provider);

~~const Web3 = require("web3");
let provider = new Web3.providers.WebsocketProvider('wss://ws.apothem.network/ws');
let web3 = new Web3(provider);~~

For Http RPC

1. const Xdc3 = require("xdc3");
2. let provider = new Xdc3.providers.HttpProvider('rpc.apothem.network');
3. let xdc3 = new Xdc3(provider);
4. 

const Web3 = require("web3");
let provider = new Web3.providers.HttpProvider('rpc.apothem.network');
let web3 = new Web3(provider);