According to aerotelegraph a Lufthansa spokesman said the airport markings were misleading: they claim no crosses were painted on the runway, but the new runway was fully lit. If that was true then the airport was asking for trouble.
Typical German arrogance. Always other to blame, we are the best.
How could the runway be "fully lit", when the taxiways are still under construction, side pavements of the runway are still not ready.
There are also no approach lights installed yet.
There was NOTAM, there was ATIS, there was CAVOC.
Instead of blaming others, do apologize and make sure, it will never happen again.
(BTW: Close to the airfield there is a motorway under construction.
Also straight and wide, and no crosses, be careful.)