Hi Chris,
I applied this fix on my test environment and it worked fine.
But, when I applied same solution on production, I faced the issue you have.
The problem was that my test is on http and production is on https.
I fixed this issue by replacing
ret.push("http://");
with:
ret.push(window.location.protocol + "//");
in PDFFIX.js file.
I hope it helps.
Regards.