I got this crash after a block fell. The repose mod makes it so that other blocks can fall from gravity.
Forge 2254
Repose v1.5
ToroQuest v3.2.1
Crash Report

https://github.com/ToroCraft/ToroQuest/blob/1.10.2/java/net/torocraft/toroquest/civilization/quests/QuestMine.java#L59

This looks like yet another bug caused from the backport, should be easy to fix.

Thanks

ToroQuest 1.10.2-3.2.2 should fix this issue, thanks.