Make auth ionic 3 with laravel api

ı want to make auth in ionic 3 with laravel api.

when ı click sigup button my signup info is inserted database very vell. but it doesnt go another page , just inserted to database. And ı face this error .

Cross-Origin Read Blocking (CORB) blocked cross-origin response http://localhost/api/studentpost with MIME type application/json. See https://www.chromestatus.com/feature/5629709824032768 for more details.

signup.ts

export class SignUpPage {
  responseData : any;
  userData = {"full_name":"", "password":"","email":"","name":""};
 


signup(){
    this.authProvider.postData(this.userData,'signup').then((result) => {
     this.responseData = result;
     if(this.responseData.userData){
     console.log(this.responseData);
     localStorage.setItem('userData', JSON.stringify(this.responseData));
     this.navCtrl.push(HomePage);
     }
     else{ console.log("User already exists"); }
   }, (err) => {
     // Error log
   });

 }

service provider

postData(credentials, type){

    return new Promise((resolve, reject) =>{
      let headers = new Headers({
        'Content-Type' : 'application/json'
      });
      let options = new RequestOptions({ headers: headers });

    
      
    this.http.post(apiUrl, JSON.stringify(credentials), {headers: headers}).
      subscribe(res =>{
        resolve(res.json());
      }, (err) =>{
        reject(err);
      });

    });


  }