This has been a consistent issue I have had for some time now. Anytime I try to import a reference from any Elsevier journal, I get the reference, but without the pdf. This occurs whether I have proxy support enabled in Paperpile and/or I manually enter the proxy information into the browser address field. My only option is to open the pdf into another browser tab and then attach the pdf to the reference entry using the Paperpile extension.
Is anyone else having this problem? Is there a possibility I have something set-up incorrectly on my end? I don’t have this issue with Zotero.