Single post in Browser-specific features (previously Chrome-only)

I don't know if anyone else has been having this problem, but for some reason it keeps "notifying" and says, "Error Invalid access key - check your Settings." I've tried checking my chrome settings, and I also right clicked on the notification and pulled up "Settings..." on it, but all that does is give me the option to toggle the notifications on or off. The access key I used was the one I used with the link I was given; I uninstalled the app and tried again, and got the same access key and the same problem. Help?