Preview PDF file attachment sometimes doesn't work

We have a table with PDF attachments in a column. I cannot view them in preview mode (Chrome, windows), however my colleague can. I have tried PDF’s that I uploaded along with ones that others have, and both show the same behavior.

I see a grey popup:
This content is blocked. Contact the site owner to fix the issue.

I am able to download the file.

It works in Edge…maybe something to do with my site settings or a plugin…

Hm not sure, anyone ran into this? I had my “Popups and redirects” chrome site setting set to “Block (Default)”, but I changed it to “Allow” blew away cookies and reloaded chrome but the issue persists.

Maybe related, I see this in the chrome dev console each time I try to load the pdf preview:
Refused to frame '' because it violates the following Content Security Policy directive: "frame-src *".

Found the problem, at some point I had changed chrome to automatically download PDF documents instead of previewing them, but for coda, it wouldn’t automatically download and the preview failed. I reverted this chrome setting and now the preview works:

(reverted setting)