The Vive OpenXR Unity package I downloaded from GitHub will not install.

[vertex798]

1. I created a project in Unity 6 using the VR Core template. (The same thing happens in Unity version 2021.3.51f1 as well.)

2. I downloaded the installer package from GitHub and installed the Installer into my Unity project.

3. In Unity, I selected VIVE → OpenXR Installer → Install or Update Latest Version, but nothing happened except the following messages appeared in the Unity Editor Console: Has Status?Failure

[console]
Processing package folder: https://github.com/ViveSoftware/VIVE-OpenXR.git?path=com.htc.upm.vive.openxr
UnityEngine.Debug:Log (object)
OpenXR_Installer:AddPackage (string) (at Assets/VIVEOpenXRInstaller.cs:151)
OpenXR_Installer:AddGITPackages () (at Assets/VIVEOpenXRInstaller.cs:18)

Unable to add package [https://github.com/ViveSoftware/VIVE-OpenXR.git?path=com.htc.upm.vive.openxr]:
No 'git' executable was found. Please install Git on your system then restart Unity and Unity Hub
UnityEngine.Debug:Log (object)
OpenXR_Installer:AddPackage (string) (at Assets/VIVEOpenXRInstaller.cs:160)
OpenXR_Installer:AddGITPackages () (at Assets/VIVEOpenXRInstaller.cs:18)

Has Status?Failure
UnityEngine.Debug:Log (object)
OpenXR_Installer:AddPackage (string) (at Assets/VIVEOpenXRInstaller.cs:161)
OpenXR_Installer:AddGITPackages () (at Assets/VIVEOpenXRInstaller.cs:18)

Has Result?
UnityEngine.Debug:Log (object)
OpenXR_Installer:AddPackage (string) (at Assets/VIVEOpenXRInstaller.cs:162)
OpenXR_Installer:AddGITPackages () (at Assets/VIVEOpenXRInstaller.cs:18)

[vertex798]

@tony-phlin Isn't VIVE active in developer support etc?