Error: Unexpected server response (0) while retrieving PDF

ERROR:

PDF.js v1.9.426 (build: 2558a58d)
Message: Unexpected server response (0) while retrieving PDF “https://zzz.zzz.zzz.zzz/nextcloud/remote.php/webdav/AmazonS3/Timeline.pdf”.

Repro Steps:

  1. Uploaded a PDF named Timeline.pdf to Amazon AWS S3 using Amazon’s console.
  2. Timeline.pdf file is viewable within Nextcloud.
  3. Receive the error when trying to view the PDF via Nextcloud.
  4. I can download the file via Nextcloud, but cannot open the file with Acrobat PDF Reader.

I also tried uploading a file from Nextcloud to Amazon.
I cannot read the file from Nextcloud.
I cannot read the file from Amazon.

I can view/download text files and jpegs.

Default encryption module = Enabled
HTTPS = Enabled
HTTP = Disabled

Beginner experience level.

EDIT:
There appears to be a problem with the external storage/Amazon encryption option.
It also appears encryption does something differently with PDF’s, or maybe the file size.

I get this too. Was it resolveD?
Also cannot download it, acrobat reader says the file is corrupt.