Publish site not showing PDF on some browsers

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What I’m trying to do

I have been using Obsidian Publish to push data to three different Publish sites with no problems (that I know of). However, some users see the PDF as blocked or unavailable when they view the .md file containing the PDF.

Things I have tried

PDF files are displayed through a normal Obsidian file with the link to the PDF ![[file.pfd]]. The website version works fine for me using Chrome (I thought maybe there was a browser problem) but my colleague using the same type of Mac and Chrome could not load the PDF.

Apologies - I meant to write ![[file.PDF]]