[Server crashes randomly]

My server crashes randomly after having to reboot the PC while the world not being saved..

10:39:20 [sEVERE] java.lang.ClassCastException: net.minecraft.server.NBTTagEnd c

annot be cast to net.minecraft.server.NBTTagCompound

10:39:20 [sEVERE] at codechicken.enderstorage.EnderStorageManager$EnderSto

rageInv.loadItems(EnderStorageManager.java:247)

10:39:20 [sEVERE] at codechicken.enderstorage.EnderStorageManager$EnderSto

rageInv.<init>(EnderStorageManager.java:228)

10:39:20 [sEVERE] at codechicken.enderstorage.EnderStorageManager.getStora

ge(EnderStorageManager.java:118)

10:39:20 [sEVERE] at codechicken.enderstorage.TileEnderChest.q_(TileEnderC

hest.java:66)

10:39:20 [sEVERE] at net.minecraft.server.World.tickEntities(World.java:11

90)

10:39:20 [sEVERE] at net.minecraft.server.MinecraftServer.w(MinecraftServe

r.java:569)

10:39:20 [sEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftSer

ver.java:467)

10:39:20 [sEVERE] at net.minecraft.server.ThreadServerApplication.run(Sour

ceFile:492)

10:39:20 [sEVERE] Unexpected exception

java.lang.ClassCastException: net.minecraft.server.NBTTagEnd cannot be cast to n

et.minecraft.server.NBTTagCompound

at codechicken.enderstorage.EnderStorageManager$EnderStorageInv.loadItem

s(EnderStorageManager.java:247)

at codechicken.enderstorage.EnderStorageManager$EnderStorageInv.<init>(E

nderStorageManager.java:228)

at codechicken.enderstorage.EnderStorageManager.getStorage(EnderStorageM

anager.java:118)

at codechicken.enderstorage.TileEnderChest.q_(TileEnderChest.java:66)

at net.minecraft.server.World.tickEntities(World.java:1190)

at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:569)

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:467)

at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)