Can't download pdf "unexpected response from server"

Description of the issue:
I am on a site and logged in to my account, but files will not download. The message I keep getting is:

“Unexpected server response” in a red bar at the top of a new window. I have an option to click “More Info” and it displays this:
PDF.js v2.0.673 (build: 31012570)
Message: Unexpected server response (403) while retrieving PDF “”.

Steps to Reproduce (add as many as necessary): 1. 2. 3.

  1. go to
  2. login
  3. click on file to download
    Actual Result (gifs and screenshots are welcome!):

    Expected result:
    File downloads
    Reproduces how often:
    every time with this website
    Operating System and Brave Version(See the About Brave page in the main menu):
    Version 0.61.52 Chromium: 73.0.3683.86 (Official Build) (64-bit)
    Additional Information:
    I am trying to include images (screenshots) but it doesn’t look right from my view. I’m sorry - I don’t know how else to try to attach them here. I also don’t want to list my login info here and I’m not sure you’ll be able to recreate the problem without it. I am able to download pdf files from other sites, and I am able to download the files from this site in other browsers (I’ve tried Edge and Firefox)

@MamaE Issue is already logged, please track the issue here.