The build has succeeded! I did need to point the Frameworks/ARDK folder in the project navigator to the right folder on disk. I also deleted the null.framework entry from the project (thanks to @Spatializes for that idea).
After resolving those initial framework issues, I ran into an error regarding bitcode in the infinitam framework, but disabling bitcode in Build Settings seems to have solved that without problems.
Thanks for the help everyone! Future builds will show whether the null framework keeps coming back, but my issues seem to be taken care of for now 