Mirage bug after entering the "Starfall Crater" fight

Well, I was doing a T16 with 20% deli and while going through it I chose the 20% increased pack size with Varashta and left that for the end once I clear everything. Once I was reaching the end I found the "Starfall Crater" fight and cleared it. After finishing all that I came back to do the Mirage and it says: "Cannot connect to instance. That subarea no longer exists."