I am having the same problem. I have been going around and around with support for months. No one can offer anything more creative than "please update your computer now please delete and reinstall oculus oh make sure you are logged in to your facebook account now you need to run more updates and plug your computer directly into the router because we see wifi errors" and on and on and on and on but NONE of it has made one iota of difference. I've already exchanged my RiftS once, thinking it was the headset. Nope. New one did the exact same thing. Geek Squad has confirmed my computer is fine and well above spec to run the RiftS. My wifi is 300Mb, comfirmed at the computer. So that only leaves one thing... and Oculus support has not helped at all. Just more of the same every time.
You need to start the Oculus desktop app and log in using your Facebook account. Check that your Facebook settings aren't blocking the linking to your Oculus account. Also make sure the app isn't being blocked by your antivirus, firewall, hosts file, Peerblock or any other program that blocks network traffic. Good luck.