Sledgehammer Games has just launched the new 'HAVOC' DLC for their shooter Call of Duty: Advanced Warfare and unfortunately a lot of players seem experience problems playing the new 'Exo Zombie' mode that is included with the new DLC.
On twitter a lot fans are reporting issues when trying to start up the new mode. Luckily Sledgehammer has a possible fix and Acitivision is actively investigating the problems.
Obviously the problems with the HAVOC DLC only applies to the Xbox version. The HAVOC DLC hasn't been released on the PS Platforms yet. Apologies