[image-elements] Protocol error (CSS.getMatchedStylesForNode): CSS agent was not enabled

### FAQ

- [X] Yes, my issue is not about [variability](https://github.com/GoogleChrome/lighthouse/blob/master/docs/variability.md) or [throttling](https://github.com/GoogleChrome/lighthouse/blob/master/docs/throttling.md).
- [X] Yes, my issue is not about a specific accessibility audit (file with [axe-core](https://github.com/dequelabs/axe-core) instead).

### URL

https://sidigital.es/servicios/coste-por-pagina/

### What happened?

In **report.artifacts.ImageElements**

Protocol error (CSS.getMatchedStylesForNode): CSS agent was not enabled {"protocolError":"CSS agent was not enabled","protocolMethod":"CSS.getMatchedStylesForNode"}

### What did you expect?

Getting correct image details

### What have you tried?

_No response_

### How were you running Lighthouse?

node

### Lighthouse Version

9.1.0

### Chrome Version

_No response_

### Node Version

_No response_

### OS

_No response_

### Relevant log output

_No response_

Start by tracing the report.artifacts.ImageElements path and its CSS.getMatchedStylesForNode protocol call, reproducing the failure against the reported URL with Lighthouse 9.1.0 under Node. Identify why the CSS agent is unavailable, then verify that image details are collected without the protocol error.

Written by the indexing model from the issue text.