Connection to the server was unsucceful while running my ionic app on android tablet

Just builded my first apk for my ionic app and im getting this error while tryng to run with my tablet ( android versio 4.0) i already tried adding this line to config xml

 <preference name="loadUrlTimeoutValue" value="700000" />

I stop getting the error, but then it never loads… the apk runs fine on my celphone Xperia, any ideas why this happens only on the tablet?

ionic info

cli packages: (/usr/lib/node_modules)

@ionic/cli-utils  : 1.12.0
ionic (Ionic CLI) : 3.12.0

global packages:

cordova (Cordova CLI) : 7.0.1 

local packages:

@ionic/app-scripts : 3.0.1
Cordova Platforms  : android 6.2.3
Ionic Framework    : ionic-angular 3.8.0


Android SDK Tools : 26.1.1
Node              : v8.6.0
npm               : 5.4.2