Lost quest item for lore-questchain

Hello Grinding Gear Games team,

I encountered an issue during my playthrough and need your assistance.

After defeating "The Vaal Construct Zicoatl, Warden of the Core," I obtained the quest item as expected. However, while entering the trials and using an elevator, I got stuck. In an attempt to troubleshoot the situation, I mistakenly removed the quest item from my inventory.

Later, I realized I couldn’t retrieve the item or return to the boss area to defeat Zicoatl again for a replacement. I am now unable to proceed with the quest.

Could you please help me resolve this issue?

Thank you for your time and support.