Attach (recommended) or Link to PDF file here:
PDF from #4106, https://mail.gnome.org/archives/evince-list/2013-November/pdfNC0hkVW67a.pdf.

Steps to reproduce the problem:
1. Open the PDF

What is the expected behavior?
![immagine](https://user-images.githubusercontent.com/1616846/121865567-67ca4200-ccfe-11eb-8673-1d6e863fc8d5.png)

What went wrong?
The PDF doesn't load, `TypeError: can't access property Symbol(), match is null` error is logged in the console.
if (this.href || !this[$content]) {
      
      
      
      
      return HTMLResult.EMPTY;
    }
    
    if (this.transferEncoding === "base64") {
      const buffer = stringToBytes(atob(this[$content]));
      const blob = new Blob([buffer], { type: this.contentType });
      return HTMLResult.success({
        name: "img",
        attributes: {
          class: ["xfaImage"],
          style: {},
          src: URL.createObjectURL(blob),
        },
      });
    }
    return HTMLResult.EMPTY;
  }
}
class ImageEdit extends XFAObject {