Solution 1
The problem is that they are being used by Steam and are not available for Driver4VR. Solution: Go to Steam -> Settings -> Controllers -> General Controller Settings, uncheck everything, and restart Driver4VR.
Solution 2
- Install this: https://github.com/Davidobot/BetterJoyForCemu/releases
- Before uninstalling the drivers, navigate to http://localhost:26762/ and remove all the devices from the “Currently affected devices” list and then restart your computer.
- uninstall BetterJoyForCemu.