Ionic3 http post error, @angular/common/http error

Hello everyone, i am building an ionic3 app. I am having issue with the http post request. When i post data using @angular/common/http, i am getting (url: null) after building the app. But whrn i am testing in browser(chrome,firefox,edge) everything is working fine.

I have tried with CORS policy in the server side, everything is fine. I have also downgraded the version of cordova webview but nothing happen.

App build with same configuration which is already lunched is working fine. Dont know what is wrong with this current version of the app.

Any help would be appreciated. Thank You.