Link worked on my Quest and PC a month ago. I tried it recently. Cable is connected with green check, but I get a Windows Hardware Notification that Oculus isn't working correctly. I click the notification and it send me to a useless trouble shooting page. Tried various forum ideas including turning off Nvidia Experience overlay, power management on USB-C, nothing. In the Quest, I get asked about transferring files. I have tried selecting Deny and Allow. Both do the same result: not work. I select Allow for Enable Link. I get the three white loading dots and/or a black screen. Hardware notification pops up a couple of times.
Have you managed to fix this? I get the same thing. Loading dots, black screen and hardware notifications when connecting the Link cable. I've factory reset the Quest and I still can't connect.