Nullish coalescing breaks Sandpack

[iampava]

Bug report

Packages affected

• [x] sandpack-client
• [ ] sandpack-react

Description of the problem

Using the nullish coalescing feature breaks the preview.

Example from the official website:

What were you doing when the problem occurred?

What steps can we take to reproduce the problem?

Navigate to https://sandpack.codesandbox.io/docs/getting-started/usage#templates.

Choose the vanilla template and write this code

import "./styles.css";

let text;
document.getElementById("app").innerHTML = text ?? "smth";

See how an error appears (visible in the picture as well)