ANT Build failed "classes.jar not found"

[AlexUrrutia]

I'm trying to recompile the ANE for Android only, but I'm getting this error:

BUILD FAILED
/Users/alex/Downloads/ANE-ImagePicker-master/build/build.xml:95: Warning: Could not find file /Users/alex/Downloads/ANE-ImagePicker-master/android/lib/build/intermediates/bundles/release/classes.jar to copy.
I'm on a MAC OS High Sierra, what am I missing? Thanks!