Apk not working after build


Working when I am testing on my phone.But after build not working.
Just says Unfortunately app has been stopped.
My phone version : kitkat
but works on Android 6.0.0 (marshmallow)
I used these extension.

What is the problem?


Upload the error log. So it may help to solve your problem.
If you don’t know how to extract error log, check this thread.

Another option to find error log, if you uploaded this app to play store. Then for each crash reported, you will get same from your play console.