App not launching on android device

Hi I have created my first Ionic application. I have released it on GooglePlay, but, when a user downloads the app then launches the icon they get an error saying app has closed. I have already tested it on an Android device and it worked great. So, I am unsure now what has gone wrong. I am not sure if its something to do with manifest.xml. Any help is appreciated, thanks in advance.

What is your ionic info output for this project?

You should find a way to get a crash log of one of your users.
Can you reproduce the error yourself when you download and install the app from Play Store?

It is new on the app store. A user can download it but when they open it automatically closes and says cannot open