The Enigma Keys stage 3 instances “The Enigma” and “The Matrix” will be temporarily disabled until further notice due to instance logic errors that can cause crashes that affect other users/instances.
Participants who have already completed “The Enigma” instance will have the opportunity to restart “The Matrix” instance once fixes are implemented in an upcoming patch.
The support team is working through the various support cases submitted and correcting mission counters where appropriate. Please be patient.

Originally Posted Here