Background color cut off on long page

[spalan]

I have a document with a long page (48cm) and a dark background color, that I would like to print/export to pdf. The problem is that the background color and in fact the entire document is cut off at around the length of an A4 page. I've tried using a different printer and print settings, adjusting margins, finding a solution in the page setup, but was not successful.



I am attaching both the problematic file and a screenshot of Word's print preview for the document.

Thanks so much for your help!