Cannot read properties of undefined (reading 'basePath')

I am using Hono with Chanfana with Cloudflare Workers and I can't seem to figure out what is causing the error in the title of this post.
I followed this example for nested routing: https://chanfana.pages.dev/advanced-topics-patterns
However, it just shows that error. I tried using the exact example in the documentation and it still crashes with that error. Does anyone know how to fix this?