do you have the downloaded version of the game or do you actually own it on uplay or steam?
I own the Steam version of Anno 2070, and the Deep Ocean DLC which I just purchased today. I got the no text on buttons/menu bug when I tried to launch game after installing the Deep Ocean DLC, and read on Steam Forums to use Offlinepatcher to fix that bug. Now, I am getting the invalid CD key message when trying to launch game through Steam, and also UPlay (game is in UPlay library also, but was purchased through Steam). Only way I can launch game now is by running the Offlinepatcher first, but that has to be run through a command prompt. Any help or fix is greatly appreciated 😀