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.
const pageArea = target[$getParent]();
  const contentAreas = pageArea.contentArea.children;
  let index;
  if (node.startNew) {
    if (target) {
      index = contentAreas.findIndex(e => e === target) - 1;
    } else {
      index = currentPageArea.contentArea.children.findIndex(
        e => e === currentContentArea
      );
    }
  } else if (target && target !== currentContentArea) {
    index = contentAreas.findIndex(e => e === target) - 1;
  } else {
    return false;
  }
  node[$extra].target = pageArea === currentPageArea ? null : pageArea;
  node[$extra].index = index;
  return true;
}
class AppearanceFilter extends StringObject {
  constructor(attributes) {
    super(TEMPLATE_NS_ID, "appearanceFilter");
    this.id = attributes.id || "";
    this.type = getStringOption(attributes.type, ["optional", "required"]);
    this.use = attributes.use || "";
    this.usehref = attributes.usehref || "";
  }
}
class Arc extends XFAObject {