Undefined lines in PDF

I have been trying to print the pdf from:
https://www.instructables.com/id/DIY-Raspberry-Pi-Indoor-Outdoor-Webcam/
but even in the PDF preview of the document starting at page 7 and including page 8 I get a seires of lines number from 1 through 62 that all say "Undefined" and when I print the document that is exactly what it prints.  It starts to print the picture from step 7 but fails somewhere in the middle and then kicks out 2 pages of undefines before going to page 9.  I am using Adobe Acrobat Pro 8 but had the same results with the latest Adobe Reader DC.  My OS is Windows 7 with 64gb ram and 1tb hard drive.  The browser is Firefox 54.

Picture of Undefined lines in PDF
mmmelroy3 months ago

that was a bug, thanks for bringing it to our attention.

we have deployed a fix, please re-download the pdf's in question and enjoy the benefits of premium.

Excellent. Looks great. Thanks.

GregJnFla3 months ago

Same problem in pdf file here cept the count goes up to

1278. undefined

https://www.instructables.com/id/Solar-Radio-Boomb...

Southerner (author)  GregJnFla3 months ago
Is there a solution? I have not run into this problem with other Instructables PDF's, at least not yet. How do they get created? How do we/I contact Instructables and get someone to actually look at the problem?