Congrats on the 2.2.4 release 
HDP 2.2 ships with Hue 2.6.1 per the release notes. This is probably a silly question, but what is Hue 2.6.1?
The source of Hue, which (from what I can tell) is hosted at: https://github.com/cloudera/hue
goes from version 2.5.x -> 3.x. There’s no Hue 2.6 (much less a 2.6.1 version) there.