can’t access property name, t is undefined

[cvetanovskistefan72]

export function createCslEngineOnce(
dataById: Record<string, any>,
styleXml: string,
localeXml?: string
) {
const sys = {
retrieveItem(id: string) {
return dataById[id];
},

retrieveLocale(lang: string) {
  console.log(lang)
  if (!lang.startsWith("en")) {
    throw new Error(
      `This CSL file requires locale "${lang}", but only "en-US" is currently supported.`
    );
  }

  return localeEnUS.replace(/^\uFEFF/, "");
},

};

return new CSL.Engine(sys as any, styleXml, "en-US");
}

This message "can’t access property name, t is undefined" we receive it on an QA and DEV env as soon as createCslEngineOnce is called. But it does not happen locally.