React Scan ran into a problem Cannot read properties of undefined (reading '__H')

**Title**: `
React Scan ran into a problem
Cannot read properties of undefined (reading '__H')`

**Body**:

I'm following the docs exactly using the `` component method with Next.js App Router.

**Steps:**
1. Created the client component:

```tsx
"use client";
import { scan } from "react-scan";
import { useEffect } from "react";

export function ReactScan() {
useEffect(() => {
scan({ enabled: true });
}, []);

return null;
}
````

2. Imported it at the top of `app/layout.tsx`:

```tsx
import { ReactScan } from "./ReactScan"; // top-most import

export default function RootLayout({ children }) {
return (


{children}

);
}
```

But I still get this error at runtime:

Cannot read properties of undefined (reading '__H')
```

**Env:**

* Next.js 15.3.1 (App Router)
* React 18.3.1
* react-scan 0.3.3
* Node 18
```
Any idea what's wrong?