Error in Android APK

Im using ionic V4

I created a API REST over, in the simulator chrome my app work’s fine, but when i generate and run the APK for android and i clic button for submit method of apirest the console log return

2019-07-30 01:05:07.201 21012-21012/io.ionic.starter I/chromium: [INFO:CONSOLE(55398)] “ERROR”, source: http://localhost/vendor.js (55398)

I searched in google regard for this but dont found anything related for the issue.

Anyone with this issue

Thanks regards