Cannot read property 'title' of undefined

[DogFortune]

Hi

I have a problem and will contact you.
I have a problem when outputting html.

api.apib

# API
## GET /message
+ Response 200 (text/plain)

        Hello World!

when I did snowboard html -o docs docs/api.apib, the error below was shown.

✔  Input parsed: api.apib in 21 ms.
    TypeError: Cannot read property 'title' of undefined

environment

• windows10
• docker desktop
• docker image node:14