Attach (recommended) or Link to PDF file here:
[Form_MGT-7.pdf](https://github.com/mozilla/pdf.js/files/6768253/Form_MGT-7.pdf)

When we try to open the above pdf, we get in the console:
```
Warning: XFA - an error occured during parsing and binding: TypeError: x.include is not a function
```
which is caused by a typo:
https://github.com/mozilla/pdf.js/blob/b9e84ba70ec5a4a30333b9092f316c9ec7b7f079/src/core/xfa/config.js#L174
 
So fixing the typo allows to open the pdf but there is only 1 page when we have 9 in using masterpdfeditor.
yield* getContainedChildren(this);
  }
  [$isTransparent]() {
    return true;
  }
  [$addHTML](html, bbox) {
    const [x, y, w, h] = bbox;
    this[$extra].width = Math.max(this[$extra].width, x + w);
    this[$extra].height = Math.max(this[$extra].height, y + h);
    this[$extra].children.push(html);
  }
  [$getAvailableSpace]() {