The type or namespace name "InputSystem" does not exist in the namespace 'UnityEngine'

I am getting the following error. I am developing a VR experiment and I am using Quest 2 and HTC Vive. I used OpenXR and XR Management plugins to connect my devices. I am not sure how to debug the issue as the error seems to be coming from default script files. Could anyone help me with this issue ?

184959-inputsystemerrors.png

I would guess the Issue is that those scripts are using the New Unity Input system, while the project is using the old Unity Input API. Go to Window>Package Manager and try to install the new Input System Package:

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