Error converting DICOM to vtk file: network error

I just wrote this code

```typescript
readImageDicomFileSeries({ inputImages: [...fileList] }).then(d => {
const img = vtkITKHelper.convertItkToVtkImage(d.outputImage);
}
```

Start by reproducing the TypeScript example with readImageDicomFileSeries and vtkITKHelper.convertItkToVtkImage, using the attached error as the initial symptom. Check whether the network error occurs during DICOM series reading or at the ITK-to-VTK conversion boundary; done means the failure has a reproducible cause and a verified resolution.

Written by the indexing model from the issue text.