I can not reproduce the error the amazon developer support team has reported on last app submission. Here is the message I have got:
We are unable to test your app as it does not function as intended. The app exits/ force closes/ freezes/ displays an error message after being launched.
This app requires internet connection to make something usefull, in other case it will show the error message - did you mean that?
I've tested the app on real device as well as on two different emulators and can not find any issues you reported.
Please note, that the app language is not English, so are you sure a tester realy understood whats going on on screen?
Can I get a more details on what's going wrong (screnshots or whatever) to make it clear?
I created a new Case: 7717281961 on that.