Authentication The [Audience] claim value must contain a token endpoint URL | Node SDK

Hi,

I have a basic Node app and having issues authenticating. I have set my server, clientId, secretId and jwt. However, I keep getting this error

The [Audience] claim value must contain a token endpoint URL

My code looks like:

const RC_SDK = require('@ringcentral/sdk').SDK
const path = require('path')
require('dotenv').config({ path: path.resolve(__dirname, './.env') })

var rcsdk = new RC_SDK({
    'server':       process.env.RC_SERVER_URL,
    'clientId':     process.env.RC_CLIENT_ID,
    'clientSecret': process.env.RC_CLIENT_SECRET
});
var platform = rcsdk.platform();


platform.login({ 'jwt':  process.env.RC_JWT })

platform.on(platform.events.loginSuccess, function(e){
    console.log('LOGGED IN')
});

platform.on(platform.events.loginError, function(e){
    console.log("Unable to authenticate to platform. Check credentials.", e.message)
    process.exit(1)
});