OpenVR replacement?

Apologies in advanced, I am still very new to the VR scene and don’t really understand how all of it works. I was working on a VR project and up until recently we have been using unity 2018.x. Someone on the team thought it would be beneficial update unity (version 2020.1.1f1). Now our project gives 15 or so errors regarding OpenVR. As I have read, OpenVR has been depreciated and is no longer available in the project manager and nothing I find online seems to give a clue as to what to do deal with this situation. I checked the update post in this forum, which sent me to the unity documentation, which sent me to a dead GitHub page for SteamVR. If anyone can offer any advice or direction on where to go, I’d really appreciate it.

Install the unity package from here :

And follow the instructions at the end ot this page :
https://github.com/ValveSoftware/unity-xr-plugin