Error message explanation:

Not a native .apk - This is a Dalvik-only .apk, and is not supported via this method (and never will be).
Missing library dependencies - Some required symbols were not found. Make sure you have the Bionic libraries downloaded, and placed in the same folder from where you run apkenv. If it still does not work, try a different (older/newer) version of the .apk you are trying to run.
Not supported yet - apkenv does not know how to run this .apk, but it has native support, and all symbols could be resolved. It might be possible that support for this .apk could be added in the future.

Like preenv, expect this to only run games, not apps.