In addition to the excellent advice supplied by OwenBrooks, please also attempt to run the Repair Utility again should the problem persist. Please do note that you do need to log in to the Launcher in order for the Repair Utility to be available.
I hope this information helps and that the issue is resolved for you. Should it continue however, please let us know here.
You know damn well this is not a client side issue because it has reported by many, many, many
people so why do you persist in wasting everyone's time rather than going "sorry known issue work around is what Owen said".