DungeonCrawl-1.15.2-1.6.1
Forge 31.1.1

To reproduce:
Create world with set seed in singleplayer. Use /locate to find dungeon.
Teleport to the same place in the server, there won't be a dungeon.
If you do /locate in the dedicated server, server freezes, but doesn't crash (??), as it can't find a dungeon.

Deleted world and regenerated, it's there. I think I generated the world at first without the mod. Sorry!

If you do /locate in the dedicated server, server freezes, but doesn't crash (??), as it can't find a dungeon.

Did it just not find a dungeon or was there an error?

The command didn't return anything, not even "can't find structure". No error, or crash, the server just froze up. Didn't even crash from the server watchdog. No idea...

I think this is a technicality with the /locate command, not DungeonCrawl, so I closed the issue. The same thing happened when I used /locate for Mine and Slash structures in the overworld - where they don't generate. But I don't know why it happened with DungeonCrawl.

It hasn't happened again since I regenerated the world.