Blizzard have turned Mythic+ dungeons off while they try to fix a recent bug. While not explicitly stated, it’s likely it’s the bug that was allowing players to not only push very high keys very quickly, but even solo them!
M+ Disabled (Source)
We’ve temporarily disabled Mythic+ Dungeons on all realms in this region, while we investigate and fix a bug.
We expect to re-open M+ as soon as we deploy a fix, and we apologize for the inconvenience.
