Error: Cannot read property 'length' of undefined

how can i fix this? please help me
JAVA_HOME=C:\Program Files\Java\jdk1.8.0_121
Error: Cannot read property ‘length’ of undefined

[ERROR] An error occurred while running cordova run android (exit code 1).

Please paste ionic info output.

E:…>ionic info
[WARN] Error with .\www\lib\ionic\version.json file: FILE_NOT_FOUND, trying .\bower.json.

cli packages: (E:…\node_modules)

@ionic/cli-utils  : 1.9.2
ionic (Ionic CLI) : 3.9.2

global packages:

Cordova CLI : 7.0.1

local packages:

Cordova Platforms : android 6.2.3 ios 4.4.0
Ionic Framework   : ionic1 1.3.1


Android SDK Tools : 25.2.5
Node              : v6.11.2
npm               : 5.3.0
OS                : Windows 10

how did you solve your problem?