Died in trail in last room at the same time as the boss.

I was completing a solo run of the Sekhemas Trail, I unfortunately died right at the same time that I killed the final boss in the fourth room and witnessed the drop of all my items, which I photographed. I was unable to resurrect. After logging out and back in, I was in the Ardura Caravan with my portal still open.

However, when I attempted to use the portal, I encountered the following error messages: "Error: Failed to join instance because the other side of the portal disconnected. Error: Failed to join any instances."

Sadly, it appears that the relic I obtained, along with all the other items I dropped, are now lost in the ether.

Any help would be greatly appreciated.