"VJoy is not available"

[namenamenam]

I want to set up VJoy to emulate DInput devices in WiinUPro, so that I don't have to use a secondary input feeder to make the controllers work with older games. I have Vjoy 2.1.9.1 because it's the only version that I could successfully install on my Windows 11 machine. However when I configure my controller input under the "Joystick" tab, I only see a message saying "VJoy is not available". Does this have something to do with my version of VJoy? The controller I'm using? My computer as a whole?
The created virtual joysticks are enabled.

[KeyPuncher]

Likely the version. The VJoy implementation was written while development started under Windows 7.
I would like to do an overhaul of the application at some point that brings it up to latest coding standards and targets Windows 11 (or at this rate 12) specifically.