Blank screen on genymotion or devices

hi , i made a little app , and try to test it on genymotion or devices ,but i get a blank, the app works great on ionic view but not on genymotion and devices.

anyone can help me with this?

do you get any error messages in the log?

nothing, the app only works on chrome browser , in other browser like firefox or edge , its also white screen , maybe something with my app , but i dont have any error