@Hlaaftana, indeed, that was the major problem, although with that file replaced, there were also some other problems to do with compatibility with the latest Gradle build system (it is now required that activities have export be set to "true", and with a warning to do with compatibility with a future Gradle build system (jstore() will no longer be supported); I also updated required build SDK to the latest Android 31 (S) and NDK versions. I've updated the README.md file to reflect the changes, which are also listed in my response to the issue.
Thank you so much for your help is solving this...
