I downloaded Lightroom CC a few days ago as part of a Creative Cloud package. I'm now unable to close, minimise or use lightroom cc due to a pop-up message that says 'an error occurred while attempting to sign in to your account, please check your account information. Error: (this is blank). I've updated passwords, confirmed my account, I dont know what else to do & I cant use lightroom cc or access my desktop, or shut down/restart my laptop - every time I click 'OK' in the error message it just comes back up again, its infuriating!!