spout

21:50:01 [SEVERE] Exception in thread "main"
21:50:01 [SEVERE] java.lang.RuntimeException: Failed to detect any default world
 generator. A plugin must set it during enabling.
21:50:01 [SEVERE]       at org.spout.server.SpoutServer.start(SpoutServer.java:2
77)
21:50:01 [SEVERE]       at org.spout.server.SpoutServer.main(SpoutServer.java:24
8)