Once again I ask for help with my situation at Producteev.
I did exactly what you told me last time, the problem isn't that I don't know where the buttons are! The thing is, when the message saying who has invited me appears, I try to click on the green button that says something like "accept invitation" and there is no response. Nothing happens! The message stays there forever no matter how many times I click "Accept!
And if i close the window, the notification is still there but doesn't let me re-open it or do anything anymore when i click on it!