I had the same problem you can fix it by disabling the harrier for the NS430.
HOWEVER, it is bugged and it cannot be disabled, due to a typo in the following file:
\Mods\aircraft\NS430\entry.lua
["AV8BNA"] = {enable_options_key_for_unit = "av8b_enabled"},
Main problem is that, fixing it manually it wont pass the integrity check.