Merge file error - incorrect header check

[hluz]

Hi, Thanks for the great package. :-)

I'm getting an exception with message 'incorrect header check' when merging a file. Attaching the problem file. Appreciate if you could check when you have some time 10.10 Food Handler Training Record old.pdf .

Thanks!

[rkusa]

Hi, this might be an issue with how the PDF was saved, see https://github.com/rkusa/pdfjs/issues/240#issuecomment-985311677