Blank screen on device

If i deploy a blank app to my android device, it works fine so the issue is not with deployment, however when i deploy my real app i get a blank screen (Assuming there are errors happening). How can i get to see the list of errors/log that is happening on the device itself? My app is calling an external url end points so maybe something to do with that but I need to see the list of errors. I tried ionic run android -c but that doesnt do anything or show anything.

update: device is running android 4.4.2 with usb debugging enabled on the device

found the problem using google chrome debugger…