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.
} else if (target instanceof ContentArea) {
            const index = contentAreas.findIndex(e => e === target);
            if (index !== -1) {
              i = index - 1;
            } else {
              targetPageArea = target[$getParent]();
              startIndex =
                targetPageArea.contentArea.children.findIndex(
                  e => e === target
                ) - 1;
            }
          }
          continue;
        }
        flush(i);
      }
      this[$extra].pageNumber += 1;
      if (targetPageArea) {
        if (targetPageArea[$isUsable]()) {
          targetPageArea[$extra].numberOfUse += 1;
        } else {
          targetPageArea = null;
        }
      }
      pageArea = targetPageArea || pageArea[$getNextPage]();
    }
  }
}
class Text extends ContentObject {
  constructor(attributes) {