ToME: the Tales of Maj'Eyal

Now for the second time I have gotten a weird bug in the Pocket of Distorted Time. Upon reaching the second floor, instead of receiving the lore piece from the Eidolon, I instead get a lovely lua error as shown on the attached screenshot. Upon reaching the final floor, I do receive the lore, but the area boss is nowhere to be found. It's now the third time I reached this area, which was only functionnal the first time around. I ended the game process to keep my save at the entrance of the dungeon and the bug appears each time i go through it. Has anyone seen this bug or know of a way to fix it?

Bumping this. I just had an instance where it happened to me - Lua error on the second instance and no boss spawn on final instance.

I made a topic on this same issue recently:
http://forums.te4.org/viewtopic.php?f=42&t=47064