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.
constructor(attributes) {
    super(CONFIG_NS_ID, "window");
  }
  [$finalize]() {
    const pair = this[$content]
      .trim()
      .split(/\s*,\s*/, 2)
      .map(x => parseInt(x, 10));
    if (pair.some(x => isNaN(x))) {
      this[$content] = [0, 0];
      return;
    }
    if (pair.length === 1) {
      pair.push(pair[0]);
    }
    this[$content] = pair;
  }
}
class Xdc extends XFAObject {
  constructor(attributes) {
    super(CONFIG_NS_ID, "xdc",  true);
    this.uri = new XFAObjectArray();
    this.xsl = new XFAObjectArray();
  }
}
class Xdp extends XFAObject {