Hi
when you change settings for homekit in paperui the port is converted in config file from 9124 to 9214.0
Travis
I’ve noticed the same issue… causes the module to not load too…
It would be great if you could open an issue for this at https://github.com/openhab/openhab2-addons/issues
Even better at https://github.com/eclipse/smarthome/issues, because it seems to me the bug is on the ESH code, not within the homekit add-on.
Or there 
Sorry do not have a github account
I have entered one: https://github.com/eclipse/smarthome/issues/1692
Just FTR, this should be fixed now in the latest distro.