Hi @pvv321, thanks for the additional details.. certainly, there should be no issue in running the XR SDK in isolation.
Accordingly, I think the best thing moving forward is to follow our extensive getting started guide for the Pico Eye and XR SDK which you can find @
https://vr.tobii.com/sdk/develop/unity/getting-started/pico-neo-2-eye/
If you could confirm that you go through all these steps (of which there are quite a few) and get back to us.
I would also ensure you are running the correct and latest versions as the ones you have supplied do not correspond to what is most recently available on our download site @ https://vr.tobii.com/sdk/downloads/
Best Wishes,