Instagram error "Cannot read properties of undefined (reading 'x-ig-set-www-claim')"

### Routes

```routes
/instagram/2/:category/:key
```

### Full routes

```fullroutes
/instagram/2/user/stefaniejoosten
```

### Related documentation

https://docs.rsshub.app/install#route-specific-configurations

### What is expected?

See RSS :)

### What is actually happening?

I got this error:
TypeError: Cannot read properties of undefined (reading 'x-ig-set-www-claim')

### Deployment information

Self-hosted

### Deployment information (for self-hosted)

Node Version: v21.7.2, Git Date: Sun, 07 Apr 2024 19:18:43 GMT

### Additional info

```shell
I have set IG_COOKIE set as suggested here https://github.com/DIYgod/RSSHub/discussions/13237, but I got this error: TypeError: Cannot read properties of undefined (reading 'x-ig-set-www-claim')

Error Message:
TypeError: Cannot read properties of undefined (reading 'x-ig-set-www-claim')

Route: /instagram/2/:category/:key

Full Route: /instagram/2/user/stefaniejoosten

Node Version: v21.7.2

Git Hash: 8757a93f

Git Date: Sun, 07 Apr 2024 19:18:43 GMT
```

### This is not a duplicated issue

- [X] I have searched [existing issues](https://github.com/DIYgod/RSSHub/issues) to ensure this bug has not already been reported

Start at the entry point for /instagram/2/:category/:key and reproduce /instagram/2/user/stefaniejoosten using the supplied IG_COOKIE and Node v21.7.2 context. Trace where x-ig-set-www-claim is read, and consider the work done when the route returns an RSS feed without this TypeError.

Written by the indexing model from the issue text.