Typescript keyInterface can't be null

[Fronix]

Can't null the key unless I //@ts-ignore it

Argument of type 'string | null' is not assignable to parameter of type 'keyInterface'.
  Type 'null' is not assignable to type 'keyInterface'.  TS2345

  const { data: results, isValidating: loading } = useSWR(
    value ? `/api/search/autocomplete/${entity}/?query=${value}` : null,
    (url: string) => fetch(url).then(_ => _.json())
  );