Problem/Bug *Cauldron Jar not working.

Since there is no alternative section for Bukkit anymore, I have to post in the next related thing.
It says that there is a port that is already used, but the main thing is that it says that the state engine was in the incorrect state POSTINITIALIZATION.

[16:38:46 INFO]: Starting Minecraft server on 192.168.0.24:25566
[16:38:47 WARN]: **** FAILED TO BIND TO PORT!
[16:38:47 WARN]: The exception was: java.net.BindException: Address already in use: bind
[16:38:47 WARN]: Perhaps a server is already running on that port?
[16:38:47 WARN]: Can't revert to frozen GameData state without freezing first.
[16:38:47 INFO]: Applying holder lookups
[16:38:47 WARN]: Unable to lookup chisel:cobblestoneWall for public static team.chisel.block.BlockCarvableWall team.chisel.init.ChiselBlocks.cobblestoneWall. Is there something wrong with the registry?
[16:38:47 WARN]: Unable to lookup chiselbsidian2 for public static team.chisel.block.BlockCarvable team.chisel.init.ChiselBlocks.obsidian2. Is there something wrong with the registry?
[16:38:47 WARN]: Unable to lookup chisel:voidstonerunic for public static team.chisel.block.BlockCarvable team.chisel.init.ChiselBlocks.voidstonerunic. Is there something wrong with the registry?
[16:38:47 WARN]: Unable to lookup chisel:circuits for public static team.chisel.block.BlockCarvable team.chisel.init.ChiselBlocks.circuits. Is there something wrong with the registry?
[16:38:47 INFO]: Holder lookups applied
[16:38:47 INFO]: The state engine was in incorrect state POSTINITIALIZATION and forced into state SERVER_STOPPED. Errors may have been discarded.