Listed below are troubleshooting methods that you can try in order to fix Steam Workshop not downloading mods. Another factor is using the incorrect download region and outdated Steam application.
There are several factors that can cause this particular problem to occur from a corrupt files on Steam workshop, download cache contains broken files, corruption problem on Steam Installation to the Steam account tied to beta. In this article of our latest troubleshooting series, we will tackle ways on how to fix Steam Workshop not downloading mods on Windows 10. Although users reported the issue are using Windows 10, it is not limited to Windows 10 but also other users also reported the same issue with Windows 8.1 and Windows 7.
Either mods does not appear on the download queue nor mods are not registered for download. There have been reports from users experiencing download issues wherein they cannot download mod from Steam’s workshop.