Bukkit

Boom chest. No resourse =(

21:33:11 [WARNING] AIR at 454; 70; 797
21:33:14 [WARNING] Error detected, please report the whole message
21:33:14 [WARNING] ClassCastException when replacing a chest :
21:33:14 [WARNING] org.bukkit.craftbukkit.v1_7_R4.block.CraftBlock
21:33:14 [WARNING] AIR at 455; 70; 798

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Console

[21:33:14 WARN]: [CreeperHeal] Error detected, please report the whole message
[21:33:14 WARN]: [CreeperHeal] ClassCastException when replacing a chest :
[21:33:14 WARN]: [CreeperHeal] org.bukkit.craftbukkit.v1_7_R4.block.CraftBlock
[21:33:14 WARN]: [CreeperHeal] AIR at 455; 70; 798
[21:33:14 WARN]: java.lang.ClassCastException: org.bukkit.craftbukkit.v1_7_R4.bl
ock.CraftBlockState cannot be cast to org.bukkit.inventory.InventoryHolder
[21:33:14 WARN]:        at com.nitnelave.CreeperHeal.block.CreeperChest.update(C
reeperChest.java:149)
[21:33:14 WARN]:        at com.nitnelave.CreeperHeal.block.CreeperBlock.replace(
CreeperBlock.java:247)
[21:33:14 WARN]:        at com.nitnelave.CreeperHeal.block.CreeperExplosion.repl
ace_one_block(CreeperExplosion.java:167)
[21:33:14 WARN]:        at com.nitnelave.CreeperHeal.block.CreeperExplosion.chec
kReplace(CreeperExplosion.java:342)
[21:33:14 WARN]:        at com.nitnelave.CreeperHeal.block.ExplodedBlockManager.
checkReplace(ExplodedBlockManager.java:222)
[21:33:14 WARN]:        at com.nitnelave.CreeperHeal.block.ExplodedBlockManager.
access$1(ExplodedBlockManager.java:216)
[21:33:14 WARN]:        at com.nitnelave.CreeperHeal.block.ExplodedBlockManager$
2.run(ExplodedBlockManager.java:297)
[21:33:14 WARN]:        at org.bukkit.craftbukkit.v1_7_R4.scheduler.CraftTask.ru
n(CraftTask.java:71)
[21:33:14 WARN]:        at org.bukkit.craftbukkit.v1_7_R4.scheduler.CraftSchedul
er.mainThreadHeartbeat(CraftScheduler.java:350)
[21:33:14 WARN]:        at net.minecraft.server.v1_7_R4.MinecraftServer.v(Minecr
aftServer.java:641)
[21:33:14 WARN]:        at net.minecraft.server.v1_7_R4.DedicatedServer.v(Dedica
tedServer.java:289)
[21:33:14 WARN]:        at net.minecraft.server.v1_7_R4.MinecraftServer.u(Minecr
aftServer.java:584)
[21:33:14 WARN]:        at net.minecraft.server.v1_7_R4.MinecraftServer.run(Mine
craftServer.java:490)
[21:33:14 WARN]:        at net.minecraft.server.v1_7_R4.ThreadServerApplication.
run(SourceFile:628)