@ditch and @Different Computers, thank you both for your logs which has (I hope) enabled me to crack the problem.
I have uploaded version 1.0.3 for you to try.
The error (on my part) was to leave in a bit of testing code which was marked up with '**TEMP**' comments so I wouldn't forget to remove it!
The effect of this code was to fix the nanoleaf's IP Address to my physical device which explains why the plugin was working for me and not for you.
I still need to look at the initial discovery delay which means that the plugin can't control or get feedback from the nanoleafs while discovery is in progress - this will cause the nanoleafs to show a No Ack while this is in progress.
Anyway, give the new version a try and see what happens.