Property 'error' does not exist on type 'object'

### Description

missing a `@ts-expect-error`
<img width="550" height="242" alt="Image" src="https://github.com/user-attachments/assets/170525ec-4769-490f-a856-5b0c97082926" />

### Reproducible example or configuration

https://stackblitz.com/edit/hey-api-client-fetch-example

### OpenAPI specification (optional)

_No response_

### System information (optional)

_No response_