I am having the exact same issue. I've submitted my logs via a support ticket but have not received a response back. I haven't tried a third party cable because I was just waiting for the official but so far no luck. I keep just getting "PC not detected" error no matter what I try.
Chiming in with the same problem.
My third party cable from Amazon:
GodSpin USB-C to USB-C Cable (20Gbps) SuperSpeed [Certified] USB Type-C to USB Type-C, 100W Power (USB 3.1 & 3.2 Compatible) Nylon Braided, Dual 4k or Single 5k @60hz Display (6.6ft/20Gbps)
When running my PC, I restarted both Quest and computer.
Quest is detected on my PC with both cables (albeit inconsistently when using the official Quest Link cable):
Using Oculus Link cable, I get the "PC not detected" error when enabling Link manually through Quest settings.
Without touching or restarting anything else, I simply swap out the cables and everything works.
Running on Windows 10, all updates. I am using a 3.1 USB-C port.
My computer is an Origin Laptop, Eon17-X (aka Clevo P775TM1-G).
I can't seem to find any changelogs on it, but it fixed my issue. Official Link Cable now works!
Oculus App Version 188.8.131.526.268 (184.108.40.2066.268)