Chaos Trial - Not Opening - "Operation could not be completed"

In the same situation in chaos trial.
Died to the boss , but also killed it, it bled out :)

This Happened to me as well, But... I found a work around.

I took my "Chimeral Inscribed Ultimatum" out of the alter. Then walked back out of the area to the Chimeral Wetlands. After I loaded the wetlands map in, I used Ctrl + LClick to bring up the instance menu, and started a new instance.

After that I was able to place the Ultimatum into the alter and enter again.

Weird bug, but at least there is a workaround.

Ctrl click does nothing for me