I'm stuck at Luculla Mines and can't continue game. There are details.

I'm playing Honour Mode with 1 save slot and 2 characters with Lone Wolf trait. I was following a quest in Luculla Mines. I made it to the end of mines, a part with mirrors and rooms (library, tomb, etc.). In the last room i saw a mirror that allows to leave a mine. But an accident was happend. In that last room one of my characters fell dead and I have no Resurection skill/scrolls to help it. But last mirror wont let you out alone (without your team). A Teleportation Pyramids also don't work at those mines. So my survived character got stuck at mines forever!

What can i do in this situation? Is it a technical issue?