This has happened twice to me. It first happened a week ago on EV HM. Then tonight on EC SM. I'm really getting tired of all these bugs in this game.
I hear ya!
Tonight we got to Colonel Vorgath HM and for some dumb reason I and another decided to run into a new grid before the bomb was disarmed. Wiped the raid, couldn't recover from it.
Then we got the error. Ops was done for the night.
And even if we where able to get back in after the error,we would have had to clear ALL the trash again to Minesweeper boss! ARG!