Prompt execution failed Prompt outputs failed validation: LoadImage: - Custom validation failed for node: image - Invalid image file: input-18.jpg

### Custom Node Testing

- [x] I have tried disabling custom nodes and the issue persists (see [how to disable custom nodes](https://docs.comfy.org/troubleshooting/custom-node-issues#step-1%3A-test-with-all-custom-nodes-disabled) if you need help)

### Expected Behavior

Prompt execution failed
Prompt outputs failed validation:
LoadImage:
- Custom validation failed for node: image - Invalid image file: input-18.jpg

### Actual Behavior

Prompt execution failed
Prompt outputs failed validation:
LoadImage:
- Custom validation failed for node: image - Invalid image file: input-18.jpg

### Steps to Reproduce

Prompt execution failed
Prompt outputs failed validation:
LoadImage:
- Custom validation failed for node: image - Invalid image file: input-18.jpg

### Debug Logs

```powershell
Prompt execution failed
Prompt outputs failed validation:
LoadImage:
- Custom validation failed for node: image - Invalid image file: input-18.jpg
```

### Other

_No response_