When I try to generate a dungeon on a new map (no with command but "naturaly").

A message appears on console with this message:
03.04 17:03:02 [Server] Server thread/INFO [STDOUT]: [greymerk.roguelike.worldgen.spawners.Spawnable:generate:66]: Not a mob spawner.

And the server freeze.

SpongeForge
Minecraft: 1.10.2
SpongeAPI: 5.2.0-SNAPSHOT-a3257a0
SpongeForge: 1.10.2-2254-5.2.0-BETA-2236
Minecraft Forge: 12.18.3.2254
Roguelike version: RoguelikeDungeons-1.10.2-1.5.9.jar