Failed login session

Ionic Framework ionic-v3
1

I get this error when trying to log in via TwitterConect plugin “Failed login session”

ttLogin() {
    this.twitter.login().then((res: TwitterConnectResponse) => {
      this.ttUser = res;
      console.log(res, '***********************')
    }, (err) => {
          console.log(err, '************** error *******************');
    });
}