Built ionic app doesn't send requests

Good day.
My application has stopped sending requests and it seems like angular-routing doesn’t work too.
When I use ionic serve everything is fine. My app works correctly.
After running command ionic cordova build browser --no-interactive --prod app successfully built, but works incorrect.
All files in their places, routing set correctl. Seems like the thing in a build.
Any ideas?

ionic info

cli packages:

@ionic/cli-utils  : 1.13.1
ionic (Ionic CLI) : 3.13.2

global packages:

cordova (Cordova CLI) : 7.1.0

local packages:

@ionic/app-scripts : 1.3.8
Cordova Platforms  : android 6.2.3 browser 5.0.1
Ionic Framework    : ionic-angular 2.0.0-rc.5


Android SDK Tools : 26.0.2
Node              : v6.11.1
npm               : 5.3.0
OS                : Windows 10


backend : legacy