PDF view-disable download

Hi I extremely new to bubble.io so still figuring lots out. I have NO coding exp at all.
I have just installed the adopbe developer api key for the pdf view. It all worked well and I can see demo pdf.
I now want to swap to my own pdf and have changed the highlighted parts with my own info

However the pdf isn’t loading when i go to the preview screen. Is it an issue with the pdf source?