uk-select `error` attribute does nothing

[BeMoreDog]

Im using:

  <link rel="stylesheet" href="https://unpkg.com/[email protected]/dist/css/core.min.css" />
  <script src="https://unpkg.com/[email protected]/dist/js/core.iife.js" type="module"></script>
  <script src="https://unpkg.com/[email protected]/dist/js/icon.iife.js" type="module"></script>

and applying error to a uk-select seems to have no effect. I expected a red danger state on the select?

<uk-select error uk-cloak>
      <option value="option1">Option 1</option>
      <option value="option2">Option 2</option>
      <option value="option3">Option 3</option>
      <option value="option4">Option 4</option>
      <option value="option5">Option 5</option>
    </uk-select>