I wanted to get maps out of the app that weren't thresholded, and I was told in the github issue section to just build the source from app. I've tried everything today, using Android 8.1, 8.0, 4.4 and using NDK 16, 11c, 10e, changing path files, local.properties, changing File Structure, changing things in gradle.properties, every solution I could find online.
I still get the same error. "Process 'command '/opt/android-ndk-xxxx/ndk-build'' finished with non-zero exit value 2", no matter what I do or try.