I am facing this issue when I am trying to Run Example code Hello Word that is provided by you.
Also Tried github solution for his problem as mentioned on some others thread for same problem.
I am using below Environment
Gradle : 2.1.3
API : 23
Aspose jar :aspose-words-1.12-android-jdk16.jar
For reference some screen shot are attached.
The issues you have found earlier (filed as WORDSANDROID-194) have been fixed in this Aspose.Words for Android 17.2.0 update.