I've run a Zen Cart site since 2010, with little or no problems. I sell 95% digital products, with a very few physical items.

Unfortunately, my web server just updated PHP, and my ZC installation died so I had to update to the latest release.

Everything is done, tested, and working, except when someone purchases a digital product, there is no way for them to download it. The order is approved, they get an email, and the order shows up in their history, but there's no download link and no button. I've tried:
  • Verified the Downloads are configured correctly
  • Verified the files exist (all have green lights beside them in the Download Manager)
  • Confirmed both Configuration.php files are correct


I also found a "missing download button" issue in the list of known bugs, and attempted to patch the code with what was in GitHub, but I'm not a developer and have no idea if I did it right (the site is still working otherwise, though, so I assume I didn't break anything).

Has anyone else had this issue? Do you have any recommendations on what else to try?