Not working.

[mateusdcc]

When I try to run it, it appears the following error:
error: Too many elements, must be exactly 0
My OS: NixOS 21.05
Complete output:
error: Too many elements, must be exactly 0 ┌─ /home/mateusc/.config/eww/eww.yuck:67:5 │ 67 │ (label :text "${weather.description}") │ ────────────────────────────────────── these elements must not be here │ → Consider wrapping the elements in some container element → User-defined widgets cannot be given children.