The game has an error reporting system, and until you disable it, errors keep popping up.
For example, in dungeons, when you try to open a chest, the game displays an error window. Changing weapon or armor equipment sometimes triggers this error window. If I remember correctly, buying slaves or servants from guilds also causes an error window. Even sometimes, when characters travel from one location to another, the error window pops up when changing locations. In the end, I was forced to disable the error window, although that doesn't mean the errors stop occurring (even though the error window no longer appears). There are no traps in the dungeons; at least, I never saw any. "Eternal Ice" is supposed to appear as a drop in the lava dungeon. However, I've rarely seen one appear, usually after defeating the final boss of the dungeon. It's supposed to be a common drop in this dungeon, but it isn't. Soul stones are extremely rare and only appear in the lava dungeon upon defeating the boss on some occasions. They rarely appear in the elven capital.
I've also noticed that depending on the language you're playing the game in, some errors may stop occurring, while others may appear. These errors appear in the error window when it's not disabled.
And lastly, I just want to ask, are there bosses in the Tower of Dreams? I've never seen them. That reminds me that the drops from the Tower of Dreams are mostly cotton cloth and a dungeon scroll. Only the lava dungeon in the Tower of Dreams usually drops mythril or adamantine; there isn't the same variety of drops as in a normal dungeon. Oh yes, and before I forget, when you find resources in the Dream Tower, the option "leave for later" appears. Even if you choose this option, you can't mine the items in the Dream Tower. The mining option doesn't appear in the Dream Tower after all.