Empty page with frontmatter resulting in i.map error

[rufuspollock]

Rendering this page https://github.com/life-itself/strategy/blob/main/Strategy%20v2%20consolidated.md which just has frontmatter:

---
authors: Rufus Pollock
---

Results in an error: https://strategy.lifeitself.org/Strategy%20v2%20consolidated

i.map is not a function