Permitted food for elves seems invalid and mismatched with origin description.
Right now elves can eat all meat (ex, beef, chicken, salamon, spider eye) but they cannot eat most plant stuff (ex. cooked potatoes, beetroots, apples, carrots).
It seems that is reversed but they still can eat berries.

From origin description it sounds logical to permit all plant-based food, shrooms and maybe honey, but forbit all meat and fishes.
I hope you'll look at this soon :)

tl;dr
Elves behaves like carnivores, but from description it sounds like they should be vegeterians

Tested on 1.19
medieval origins 4.1.1

Update: Now it works as intended. Thread can be closed