Failed to load mods: __aircraft_tweaks__/data-final-fixes.lua:22: attempt to index field 'cargo-plane-carbon-fiber' (a nil value)
stack traceback:
    __aircraft_tweaks__/data-final-fixes.lua:22: in main chunk

Mods to be disabled:
• aircraft_tweaks (0.0.5)

I have the space-age mod disabled, which I assume is causing this error (since Aircraft only adds the carbon fiber planes when space age is enabled).

Oh shoot! Yeah, I think the way my mod tweaks carbon fiber vatiants, makes space age a hard requirement. I'll see if I can fix it this weekend, shouldn't be too difficult.