Since this seems to be the "doesn't work on [reader]" thread, this file doesn't open in SumatraPDF either. I saw someone suggest appending "?raw=true" to the PDF download link, but that didn't work for me either.
Interesting, I have been testing it and apparently it is Firefox's PDF.js that does not like it. I still don't know why. If you are using chrome (or even Edge) it should work.