Help to bulid android

when i use command
$ ionic cordova platform add android
show me this
Unable to load PlatformApi from platform. Error: Module ‘fsevents’ is not compatible with platform 'win32’
Error: Unhandled “error” event. (The platform “fsevents” does not appear to be a valid cordova platform. It is missing API.js. fsevents not supported.)
[ERROR] Exception:

and after some times show me this
Error: Cannot read property ‘variables’ of undefined

[ERROR] Exception: