org/no-effect
Something in an Org Entry is valid Org but changes nothing in yuanme’s output, such as a keyword for Org’s own exporter, an #+OPTIONS setting yuanme doesn’t do, or a #+CAPTION on a paragraph.
Example
#+TITLE: Pew
#+AUTHOR: Yuan
Fix
Remove it, or do it the way the note says. Here the author goes in [site] in yuanme.toml.