I have the same problem. The Publishing process seems to work fine, until "Preparing APK..." which runs for a minute or so. Then, when it finishes I can see "Signing APK" for a second and then I get "Failed to build <book>.pubcoder. An error occurred while trying to build APK file." message.
I ran Android SDK Manager and update all packages as they recommend, but still - the same result. I can't find any log file that can indicate what's wrong, and nothing in the Event Viewer as well.
Any advise?
Thanks,
Ranco