Error on icon checkbox-blank-circle-fill.svg
https://github.com/Remix-Design/RemixIcon/blob/master/icons/System/checkbox-blank-circle-fill.svg

In the preview no icon is shown. When looking at the code it looks like this:

```html
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24"><path fill="none" d="M0 0h24v24H0z"/><path d="undefined"/></svg>
```

It says `undefined` at the end. This problem only seems to appear when downloading from the website. The SVG file on Github works.