ionic run android throws error "Path must be a string. Received undefined"

[kamlmish]

D:\Trivia\trivia>ionic run android
You're trying to build for androidbut don't have the platform installed yet.
? Installing android for you.
√ Installed platform android
Running command: "C:\Program Files\nodejs\node.exe" D:\Trivia\trivia\hooks\after
_prepare\010_add_platform_class.js D:\Trivia\trivia

add to body class: platform-android

Error: Path must be a string. Received undefined

Caught exception:
undefined

Mind letting us know? https://github.com/driftyco/ionic-cli/issues

[jgw96]

Hello, thanks for opening an issue with us! Could you post the output of ionic info here please? Thanks for using Ionic!

[jgw96]

Hello all! As it seems it has been a while since there was any activity on this issue i will be closing it for now. Feel free to comment if you are still running into this issue. Thanks for using Ionic!

i'm getting the same error, my ionic info:

Your system information:

Cordova CLI: 6.3.0
Ionic Framework Version: 1.3.1
Ionic CLI Version: 2.0.0-beta.36
Ionic App Lib Version: 2.0.0-beta.19
OS:
Node Version: v5.9.1

beside the error "Error: Path must be a string. Received undefined", i wonder why OS name is blank too (im using windows 10)

i found out why, i have to set JAVA_HOME, ANDROID_HOME environment variables,

but this matter is described in Apache Cordova Project, not in Ionic Project
https://cordova.apache.org/docs/en/latest/guide/platforms/android/

[vegardlarsen]

I encountered this while doing ionic build android under TeamCity. In that case it was because I was missing the HOME environment variable, and it couldn't find .ionic/ionic.config.

[fgagneten]

Works for me doing:
Removing "platforms" and "plugins" folder in the file system. Then:
cordova platform rm android
cordova platform add android