Problem Internal Server error

W

wilpo

Guest
When me and my freinds try to login on the server it says "Internal server error" What can i do to make it work again?

Here is the server log

INFO] User wilpo2 connecting with mods [Thaumcraft, AdvancedMachines, WR-CBE|RedPower, BuildCraft|Silicon, factorization.dimensionalSlice, MiscPeripherals, BinnieCore, XyCraftWorld, BiblioCraft, GregTech_Addon, BuildCraft|Core, CCTurtle, ExtraBees, PortalGun, EE3, Mystcraft, RedPowerBase, AppliedEnergistics, factorization.misc, WR-CBE|Core, RedPowerWiring, MFReloaded|CompatForestry, ThermalExpansion, MFReloaded|CompatExtraBiomes, TwilightForest, BuildCraft|Factory, Railcraft, GraviSuite, WR-CBE|Addons, Tubestuff, PowerConverters, IC2NuclearControl, EnderStorage, GraviGun, MFReloaded|CompatPams, MFReloaded|CompatThaumcraft, StevesCarts, ComputerCraft, SoulShards, drceph.petrogen, IronChest, OmniTools, XyCraftMachines, mmmPowersuits, MFReloaded|CompatIC2, RedPowerCore, MFReloaded|CompatSufficientBiomes, ImmibisCore, RedPowerControl, RedPowerWorld, ChickenChunks, BuildCraft|Energy, MFReloaded|CompatTwilightForest, AdvancedSolarPanel, IC2, RedPowerLogic, MFReloaded|CompatSoulShards, NetherOres, MFReloaded|CompatRP2, RedPowerLighting, XReliquary, ChargePads, ExtrabiomesXL, RedPowerMachine, ModularForceFieldSystem, BuildCraft|Transport, MFReloaded, SecretRoomsMod, ThermalExpansion|Energy, factorization, MFReloaded|CompatXyCraft, ThermalExpansion|Factory, Forestry, RedPowerCompat, ThermalExpansion|Transport, MFReloaded|CompatVanilla, XyCraft, BuildCraft|Builders, ObsidiPlates]
2017-01-28 15:00:03 [INFO] wilpo2[/] logged in with entity id 4522 at (-21.5, 36.0, -7.5)
2017-01-28 15:00:03 [INFO] Disconnecting wilpo2 [/25.92.22.202:50571]: Internal server error
2017-01-28 15:00:03 [WARNING] Failed to handle packet for wilpo2 [/]: java.lang.NullPointerException
java.lang.NullPointerException
at gm.a(ServerConfigurationManager.java:114)
at it.completeConnection(NetLoginHandler.java:198)
at cpw.mods.fml.common.network.FMLNetworkHandler.handleClientConnection(FMLNetworkHandler.java:153)
at cpw.mods.fml.common.network.FMLNetworkHandler.onConnectionReceivedFromClient(FMLNetworkHandler.java:107)
at it.d(NetLoginHandler.java:182)
at it.c(NetLoginHandler.java:75)
at hu.a(ServerListenThread.java:56)
at ht.b(SourceFile:29)
at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:703)
at ho.r(DedicatedServer.java:269)
at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:599)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:497)
at fy.run(SourceFile:849)