scala js example from the landing page is not working

How to reproduce?

1. Open the landing page https://www.scala-lang.org/
2. Go to the example: "Target the Web with Scala.js on the frontend".
3. Click on run on https://scastie.scala-lang.org/ ... to get the error
<img width="1494" height="333" alt="Image" src="https://github.com/user-attachments/assets/06eb3730-656b-4ba5-b967-bd2ca096a2ec" />

Browser: Firefox, Chrome