vr project on unreal

im trying to design a VR project in unreal but the controllers of the valve index headset are not working. in the very beginning, I tested it and it was fine but now it’s not working even in a blank file. I don’t know what I did wrong so I’m gonna explain the whole process of the project. It’s an architecture project so I started with a datasmith link from rhino then the file crashed I picked every mesh manually and copied it into a new level in a new file and now teleportation and collision work out fine but the controllers do not. I tried every solution in the discussions but still nothing.