Hi Keronei,
Thanks a lot for your message with such a detailed description. It actually made us realize that there is indeed bug in the SDK.
We will fix it and let you know as soon as you can use the corrected version with the skeleton app.
However, you should be able to click on the app from your phone and clear the storage, removing this inconsistent state.
Please let us know if this solves your problem and you can successfully log in.
Are you using one of the test servers or your own implementation?
Thanks a lot.