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

"

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.

Thanks for this suggestion, it worked for me. I failed the Trial and grabbed my Inscribed Ultimatum from the Temple Offering statue. I did the same, exited to Chimeral Wetlands and Ctrl + Left Clicked on the words / name of the zone "The Temple of Chaos" and this opens a menu to create a new instance. New to PoE in general and didn't know this kind of menu existed, so thanks for the tip.