From your post, there seems to be 2 steps in the process. Download then convert. Are we downloading? Maybe sounds like we are but unclear if the download is part of the pacpl command.
While you have made no modifications, is your system running an "apt-get update" in cron or do you have a Control Panel what may have updated without your knowledge.
Look for update logs the relate to your configuration. A good starting point is in /var/log.
Hope this helps a little.
"To error is human. To really muck things up requires the root password."