Sometimes, you are unable to see your files in PaperShip.
You can get an error message or see a webpage rather than the file you were looking for.
Usually, it means that the files are not synced between your computer and the Zotero or Mendeley platform.
Please make sure that your files are available on their web interfaces.
If your files are not uploaded to these platforms, please contact the Zotero or Mendeley support directly as this issue is related to their services.
Otherwise, if you're able to see your files on Internet, send us a message at firstname.lastname@example.org and we’ll assist you.