config/unknown-key

Site config has a key yuanme doesn’t know. Unknown keys are errors, not ignored, so a typo can’t silently do nothing. Only [site.extra] takes keys of the Author’s own.

Example

[site]
url = "https://example.com"
titel = "My site"

Fix

Use the key the help suggests, such as title, or move a key of your own into [site.extra].