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My friend and I were working on this server but we get this error

[21:30:37] [Server thread/INFO]: Preparing level "world"
[21:30:37] [Server thread/INFO]
[Reika.DragonAPI.Libraries.Java.ReikaASMHelper]: DragonAPI: Running
patcher BIOMEMUTATIONEVENT [net.minecraft.world.gen.layer.GenLayerHills/axr]
[21:30:37] [Server thread/INFO]
[Reika.DragonAPI.Libraries.Java.ReikaASMHelper]: DragonAPI: Could not
find normal IINC 13 128 Insn. Checking for alternate.
[21:30:37] [Server thread/INFO]
[Reika.DragonAPI.Libraries.Java.ReikaASMHelper]: DragonAPI: Successfully
applied BIOMEMUTATIONEVENT
[net.minecraft.world.gen.layer.GenLayerHills/axr] ASM handler!
[21:30:37] [Server thread/WARN]: Unable to find spawn biome
[21:30:37] [Server thread/INFO] [FML]: Loading dimension 0 (world)
(net.minecraft.server.dedicated.DedicatedServer@22dd91f0)
[21:30:37] [Server thread/INFO] [FML]: Loading dimension -100 (world)
(net.minecraft.server.dedicated.DedicatedServer@22dd91f0)
[21:30:48] [Server thread/INFO] [EE3]: Energy value system initialized
3021 values after 1486 ms
[21:30:48] [Server thread/WARN] [EE3]: Unable to find file
'/home/account_name/minecraft/minecraft02/data/ee3/knowledge/transmutation/template-player-knowledge.json'
[21:30:48] [Server thread/INFO] [EE3]: Unable to read player knowledge
from template-player-knowledge.json, initializing a new empty one
[21:30:48] [Server thread/INFO] [FML]: Loading dimension -37 (world)
(net.minecraft.server.dedicated.DedicatedServer@22dd91f0)
[21:30:48] [Server thread/INFO] [FML]: Loading dimension -38 (world)
(net.minecraft.server.dedicated.DedicatedServer@22dd91f0)
[21:30:48] [Server thread/INFO] [FML]: Loading dimension -39 (world)
(net.minecraft.server.dedicated.DedicatedServer@22dd91f0)
[21:30:48] [Server thread/WARN]: Unable to find spawn biome
[21:30:48] [Server thread/INFO] [FML]: Loading dimension -112 (world)
(net.minecraft.server.dedicated.DedicatedServer@22dd91f0)
[21:30:48] [Server thread/INFO] [FML]: Loading dimension -1 (world)
(net.minecraft.server.dedicated.DedicatedServer@22dd91f0)
[21:30:48] [Server thread/WARN]: Unable to find spawn biome
[21:30:48] [Server thread/INFO] [FML]: Loading dimension 4 (world)
(net.minecraft.server.dedicated.DedicatedServer@22dd91f0)
[21:30:48] [Server thread/WARN]: Unable to find spawn biome
[21:30:48] [Server thread/ERROR]: Encountered an unexpected exception
java.lang.NoClassDefFoundError: Could not initialize class Reflector
at
net.minecraft.crash.CrashReport.func_71504_g(CrashReport.java:163)
~[b.class:?]
at net.minecraft.crash.CrashReport.<init>(CrashReport.java:55)
~[b.class:?]
at
net.minecraft.crash.CrashReport.func_85055_a(CrashReport.java:442)
~[b.class:?]
at net.minecraft.world.World.<init>(World.java:264) ~[ahb.class:?]
at net.minecraft.world.WorldServer.<init>(WorldServer.java:97)
~[mt.class:?]
at
net.minecraft.world.WorldServerMulti.<init>(WorldServerMulti.java:14)
~[mm.class:?]
at
net.minecraft.server.MinecraftServer.func_71247_a(MinecraftServer.java:222)
~[MinecraftServer.class:?]
at
net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:258)
~[lt.class:?]
at
net.minecraft.server.MinecraftServer.run(MinecraftServer.java:387)
[MinecraftServer.class:?]
at
net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)
[li.class:?]
[21:30:49] [Server thread/INFO] [FML]: Applying holder lookups
[21:30:49] [Server thread/INFO] [FML]: Holder lookups applied
[21:30:49] [pool-3-thread-1/INFO] [EnderIO]: ServerChannelRegister:
Dimensional Transceiver data saved to
/home/account_name/minecraft/minecraft02/./world/enderio/dimensionalTransceiver.json
[21:30:49] [Server thread/INFO] [FML]: The state engine was in incorrect
state SERVER_STARTING and forced into state SERVER_STOPPED. Errors may
have been discarded.


If you know what this means please help us!

EDIT: If you need more information just ask