Nodejs - Passport-saml implementation with One-login

I'm trying to run below passport-sample example with one login SSO. But I couldn't make it successful. I have given Onelogin HTTP-redirect url in the SAML entry point(config.js). It was redirecting to one login authentication page and redirecting back to application page but the application is not loading.

https://github.com/gbraad/passport-saml-example

Please advise what am I missing here.

module.exports = {
  development: {
    app: {
      name: 'Passport SAML strategy example',
      port: process.env.PORT || 3000
    },
    passport: {
      strategy: 'saml',
      saml: {
        path: process.env.SAML_PATH || '/login/callback',
        entryPoint: process.env.SAML_ENTRY_POINT || 'https://domain.onelogin.com/trust/saml2/http-redirect/slo/200908',
        issuer: 'passport-saml',
        cert: process.env.SAML_CERT || null
      }
    }
  }
};