Undefined variable $vocabulary

[icodealone]

 ⨯ ./node_modules/swagger-ui-react/swagger-ui.css:2:2
Syntax error: postcss-simple-vars: <css input> Undefined variable $vocabulary

  1 | .models .json-schema-2020-12:not(.json-schema-2020-12--embedded) > .json-schema-2020-12-head .json-schema-2020-12__title:first-of-type {
> 2 |   font-size: 16px;
    |  ^
  3 | }

I"ve installed and followed instructions for NextJS13. All works apart from the styling. My build is throwing out this error and I'm not sure how to address it. If I leave out the CSS import it works, but is obviously unstyled.

[jellydn]

swagger-ui-react
This UI has a lot of open issues. Could you raise with them? https://github.com/swagger-api/swagger-ui/issues