First, are you using the most recent Master version of Carbonite updated a couple of hours ago today?
Second, does this error occur in the PTR, Beta, or the live version of the game?
In the live version of the game, the latest update of Carbonite 7 works fine except for a minor issue with the tracking hud where the arrow is acting up a little. However no errors are popping up during game play on my end at this time.
If you haven't installed the latest updated version of Carbonite, download it from
https://github.com/Rythal/Carbonite/archive/master.zip and try it.
If this error is occurring in beta, then Carbonite is still in development for Legion and will show errors.
I haven't tested it in PTR yet, so I can't speak to that at this time.
I hope this helps.