I've had this "notification" for a week or so; the marker indicates that I have one but when I click on it, nothing appears. I've tried it on both Firefox and Chrome, as well as Chrome and the default browser on my phone, but it never appears. I haven't tried disabling plugins on Firefox, but I did clear cache, and my Chrome is pretty much 100% vanilla, practically newly downloaded. I have Adblock Plus on both but disabling it doesn't work on either. Also, I recall a previous notification showing up--that one was a private message, though, and this one doesn't seem to be one, as it's not in my inbox. I posted applications to a few groups beforehand, so it might be an invitation, but the groups have since been taken out of the listings. Screenshot is from Firefox on PC PC is Windows 10 Home 64-bit Firefox 53.0.3 Chrome 58.0.3029.110 Phone is Samsung Galaxy On7 Android 5.1.1 Chrome 58.0.3029.83 "Internet" app 3.5.38.161-0_101461_1705463
