I cannot get the same result as described in "Harmonic Centrality algorithm sample".
Copy/Paste the sample and run in Neo4j Desktop
In the docs there are some calculations that show numbers (not zeros).
May be I misunderstand the results from algo =)
You can find the link to the docs above
Neo4j Desktop version is 1.1.9
Neo4j DB version is 3.4.5 Enterprise