Internal Server Error when connecting to a server I co-own

[Awzzie]

I went through an iron dimensional door and the server crashed. I restarted and all of my friends can join, but if I try to I get internal server error. Here is what I get in console when I try to join:

03.04 17:48:14 [Server] SEVERE Reached end of stream for /ip removed
03.04 17:48:09 [Server] INFO [Server] rip awzzie
03.04 17:48:07 [Server] INFO [Server] rip awzzie
03.04 17:47:59 [Server] SEVERE Reached end of stream for /ip removed
03.04 17:47:59 [Multicraft] Skipped 5 lines due to rate limit (30/s)
03.04 17:47:56 [Server] INFO at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:691)
03.04 17:47:56 [Server] INFO at net.minecraft.server.dedicated.DedicatedServerListenThread.func_71747_b(SourceFile:29)
03.04 17:47:56 [Server] INFO at net.minecraft.server.ServerListenThread.func_71766_a(ServerListenThread.java:55)
03.04 17:47:56 [Server] INFO at net.minecraft.network.NetLoginHandler.func_72532_c(NetLoginHandler.java:71)
03.04 17:47:56 [Server] INFO at net.minecraft.network.NetLoginHandler.func_72529_d(NetLoginHandler.java:185)
03.04 17:47:56 [Server] INFO at cpw.mods.fml.common.network.FMLNetworkHandler.onConnectionReceivedFromClient(FMLNetworkHandler.java:121)
03.04 17:47:56 [Server] INFO at cpw.mods.fml.common.network.FMLNetworkHandler.handleClientConnection(FMLNetworkHandler.java:167)
03.04 17:47:56 [Server] INFO at net.minecraft.network.NetLoginHandler.completeConnection(NetLoginHandler.java:201)
03.04 17:47:56 [Server] INFO at net.minecraft.server.management.ServerConfigurationManager.func_72355_a(ServerConfigurationManager.java:125)
03.04 17:47:56 [Server] INFO java.lang.NullPointerException
03.04 17:47:56 [Server] WARNING Failed to handle packet for TheOGawzzieeeeee [/ip removed]: java.lang.NullPointerException
03.04 17:47:56 [Multicraft] TheOGawzzieeeeee ran command Message of the Day
03.04 17:47:56 [Server] INFO at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:583)
03.04 17:47:56 [Server] INFO at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:484)
03.04 17:47:56 [Server] INFO at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:587)
03.04 17:47:56 [Server] INFO at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:276)
03.04 17:47:56 [Server] INFO at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:691)
03.04 17:47:56 [Server] INFO at net.minecraft.server.dedicated.DedicatedServerListenThread.func_71747_b(SourceFile:29)
03.04 17:47:56 [Server] INFO at net.minecraft.server.ServerListenThread.func_71766_a(ServerListenThread.java:55)
03.04 17:47:56 [Server] INFO at net.minecraft.network.NetLoginHandler.func_72532_c(NetLoginHandler.java:71)
03.04 17:47:56 [Server] INFO at net.minecraft.network.NetLoginHandler.func_72529_d(NetLoginHandler.java:185)
03.04 17:47:56 [Server] INFO at cpw.mods.fml.common.network.FMLNetworkHandler.onConnectionReceivedFromClient(FMLNetworkHandler.java:121)
03.04 17:47:56 [Server] INFO at cpw.mods.fml.common.network.FMLNetworkHandler.handleClientConnection(FMLNetworkHandler.java:167)
03.04 17:47:56 [Server] INFO at net.minecraft.network.NetLoginHandler.completeConnection(NetLoginHandler.java:201)
03.04 17:47:56 [Server] INFO at net.minecraft.server.management.ServerConfigurationManager.func_72355_a(ServerConfigurationManager.java:125)
03.04 17:47:56 [Server] INFO java.lang.NullPointerException
03.04 17:47:56 [Server] SEVERE Error handling login related packet - connection from TheOGawzzieeeeee [/ip removed] refused
03.04 17:47:56 [Server] INFO Disconnecting TheOGawzzieeeeee [/ip removed]: Internal server error
03.04 17:47:56 [Server] INFO Cannot Hotload Dim: Could not get provider type for dimension 44, does not exist
03.04 17:47:56 [Connect] User TheOGawzzieeeeee, IP removed
03.04 17:47:56 [Server] INFO Cannot Hotload Dim: Could not get provider type for dimension 44, does not exist
03.04 17:47:56 [Server] INFO User TheOGawzzieeeeee connecting with mods