The issue has now been resolved, in a hot fix for Serato DJ Pro 2.2.1.
If you have already installed Serato DJ Pro 2.2.1, and are facing this issue, please remove the build from your computer, then download and install it again, from the Serato DJ Pro download page.
To confirm you have the hot fix installed, check the installed version by navigating to the Setup cog in Serato DJ Pro, then noting the build number in the bottom left-hand corner of the user interface. If your build number is less than 22144, please try re-downloading the installer from the link above, and then confirm it's correct, as shown in the screenshot below:
We are aware of an issue which results in a crash, when connecting HID devices to control Serato DJ Pro 2.2.1. This specifically occurs when trying to assign the virtual deck, or when completing the connection process of HID devices with Serato DJ Pro.
This issue does not affect users with DVS configurations using either media players or turntables.