I haven’t used the actual HomeKit binding for months but this line doesn’t seem right to me - if you’re interested in “fixing” the built in version.
I believe that’s supposed to be a MAC address.
Here’s a whole thread about the issue, with no apparent solution:
HomeKit No Longer Functioning - #17 by rswennen
That being said - definitely go with the nodered setup. It is far more capable than the built in option.