there is a file called debug log.
[14May2020 22:29:02.031] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher running: args [--gameDir, ., --launchTarget, fmlserver, --fml.forgeVersion, 31.1.0, --fml.mcpVersion, 20200122.131323, --fml.mcVersion, 1.15.2, --fml.forgeGroup, net.minecraftforge]
[14May2020 22:29:02.034] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher 5.0.0-milestone.4+67+b1a340b starting: java version 14.0.1 by Oracle Corporation
[14May2020 22:29:02.045] [main/DEBUG] [cpw.mods.modlauncher.LaunchServiceHandler/MODLAUNCHER]: Found launch services [minecraft,testharness,fmlclient,fmlserver]
[14May2020 22:29:02.057] [main/DEBUG] [cpw.mods.modlauncher.NameMappingServiceHandler/MODLAUNCHER]: Found naming services : []
[14May2020 22:29:02.073] [main/DEBUG] [cpw.mods.modlauncher.LaunchPluginHandler/MODLAUNCHER]: Found launch plugins: [eventbus,object_holder_definalize,runtime_enum_extender,capability_inject_definalize,accesstransformer,runtimedistcleaner]
[14May2020 22:29:02.082] [main/DEBUG] [cpw.mods.modlauncher.TransformationServicesHandler/MODLAUNCHER]: Discovering transformation services
[14May2020 22:29:02.095] [main/DEBUG] [cpw.mods.modlauncher.TransformationServicesHandler/MODLAUNCHER]: Found additional transformation services from discovery services: []
[14May2020 22:29:02.120] [main/DEBUG] [cpw.mods.modlauncher.TransformationServicesHandler/MODLAUNCHER]: Found transformer services : [fml]
[14May2020 22:29:02.120] [main/DEBUG] [cpw.mods.modlauncher.TransformationServicesHandler/MODLAUNCHER]: Transformation services loading
[14May2020 22:29:02.121] [main/DEBUG] [cpw.mods.modlauncher.TransformationServiceDecorator/MODLAUNCHER]: Loading service fml
[14May2020 22:29:02.121] [main/DEBUG] [net.minecraftforge.fml.loading.FMLServiceProvider/]: Injecting tracing printstreams for STDOUT/STDERR.
[14May2020 22:29:02.126] [main/DEBUG] [net.minecraftforge.fml.loading.LauncherVersion/CORE]: Found FMLLauncher version 31.1
[14May2020 22:29:02.126] [main/DEBUG] [net.minecraftforge.fml.loading.FMLLoader/CORE]: FML 31.1 loading
[14May2020 22:29:02.126] [main/DEBUG] [net.minecraftforge.fml.loading.FMLLoader/CORE]: FML found ModLauncher version : 5.0.0-milestone.4+67+b1a340b
[14May2020 22:29:02.127] [main/DEBUG] [net.minecraftforge.fml.loading.FMLLoader/CORE]: Initializing modjar URL handler
[14May2020 22:29:02.127] [main/DEBUG] [net.minecraftforge.fml.loading.FMLLoader/CORE]: FML found AccessTransformer version : 2.0.0-milestone.1+47+4a08f17
[14May2020 22:29:02.127] [main/DEBUG] [net.minecraftforge.fml.loading.FMLLoader/CORE]: FML found EventBus version : 2.0.0-milestone.1+57+de55078
[14May2020 22:29:02.128] [main/DEBUG] [net.minecraftforge.fml.loading.FMLLoader/CORE]: Found Runtime Dist Cleaner
[14May2020 22:29:02.130] [main/DEBUG] [net.minecraftforge.fml.loading.FMLLoader/CORE]: FML found CoreMod version : 2.0.0-milestone.1+5+5b32e68
[14May2020 22:29:02.131] [main/DEBUG] [net.minecraftforge.fml.loading.FMLLoader/CORE]: Found ForgeSPI package implementation version 2.0.0-milestone.1+7+a2eaa64
[14May2020 22:29:02.131] [main/DEBUG] [net.minecraftforge.fml.loading.FMLLoader/CORE]: Found ForgeSPI package specification 3
[14May2020 22:29:02.239] [main/INFO] [net.minecraftforge.fml.loading.FixSSL/CORE]: Added Lets Encrypt root certificates as additional trust
[14May2020 22:29:02.240] [main/DEBUG] [cpw.mods.modlauncher.TransformationServiceDecorator/MODLAUNCHER]: Loaded service fml
[14May2020 22:29:02.241] [main/DEBUG] [cpw.mods.modlauncher.TransformationServicesHandler/MODLAUNCHER]: Configuring option handling for services
[14May2020 22:29:02.246] [main/DEBUG] [cpw.mods.modlauncher.TransformationServicesHandler/MODLAUNCHER]: Transformation services initializing
[14May2020 22:29:02.247] [main/DEBUG] [cpw.mods.modlauncher.TransformationServiceDecorator/MODLAUNCHER]: Initializing transformation service fml
[14May2020 22:29:02.247] [main/DEBUG] [net.minecraftforge.fml.loading.FMLServiceProvider/CORE]: Setting up basic FML game directories
[14May2020 22:29:02.248] [main/DEBUG] [net.minecraftforge.fml.loading.FileUtils/CORE]: Found existing GAMEDIR directory : /Users/littlewhite/Desktop/Moded Server
[14May2020 22:29:02.248] [main/DEBUG] [net.minecraftforge.fml.loading.FMLPaths/CORE]: Path GAMEDIR is /Users/littlewhite/Desktop/Moded Server
[14May2020 22:29:02.249] [main/DEBUG] [net.minecraftforge.fml.loading.FileUtils/CORE]: Found existing MODSDIR directory : /Users/littlewhite/Desktop/Moded Server/mods
[14May2020 22:29:02.249] [main/DEBUG] [net.minecraftforge.fml.loading.FMLPaths/CORE]: Path MODSDIR is /Users/littlewhite/Desktop/Moded Server/mods
[14May2020 22:29:02.249] [main/DEBUG] [net.minecraftforge.fml.loading.FileUtils/CORE]: Found existing CONFIGDIR directory : /Users/littlewhite/Desktop/Moded Server/config
[14May2020 22:29:02.249] [main/DEBUG] [net.minecraftforge.fml.loading.FMLPaths/CORE]: Path CONFIGDIR is /Users/littlewhite/Desktop/Moded Server/config
[14May2020 22:29:02.249] [main/DEBUG] [net.minecraftforge.fml.loading.FMLPaths/CORE]: Path FMLCONFIG is /Users/littlewhite/Desktop/Moded Server/config/fml.toml
[14May2020 22:29:02.249] [main/DEBUG] [net.minecraftforge.fml.loading.FMLServiceProvider/CORE]: Loading configuration
[14May2020 22:29:02.278] [main/DEBUG] [net.minecraftforge.fml.loading.FileUtils/CORE]: Found existing default config directory directory : /Users/littlewhite/Desktop/Moded Server/defaultconfigs
[14May2020 22:29:02.279] [main/DEBUG] [net.minecraftforge.fml.loading.FMLServiceProvider/CORE]: Preparing launch handler
[14May2020 22:29:02.279] [main/DEBUG] [net.minecraftforge.fml.loading.FMLLoader/CORE]: Using fmlserver as launch service
[14May2020 22:29:02.284] [main/DEBUG] [net.minecraftforge.fml.loading.FMLLoader/CORE]: Received command line version data : MC Version: '1.15.2' MCP Version: '20200122.131323' Forge Version: '31.1.0' Forge group: 'net.minecraftforge'
[14May2020 22:29:02.285] [main/DEBUG] [net.minecraftforge.fml.loading.LibraryFinder/CORE]: Found JAR asm at path /Users/littlewhite/Desktop/Moded Server/libraries/org/ow2/asm/asm/7.2/asm-7.2.jar
[14May2020 22:29:02.285] [main/DEBUG] [net.minecraftforge.fml.loading.LibraryFinder/CORE]: Found probable library path /Users/littlewhite/Desktop/Moded Server/libraries
[14May2020 22:29:02.286] [main/DEBUG] [net.minecraftforge.fml.loading.LibraryFinder/CORE]: Found forge path /Users/littlewhite/Desktop/Moded Server/libraries/net/minecraftforge/forge/1.15.2-31.1.0/forge-1.15.2-31.1.0-universal.jar is present
[14May2020 22:29:02.286] [main/DEBUG] [net.minecraftforge.fml.loading.LibraryFinder/CORE]: SRG MC at /Users/littlewhite/Desktop/Moded Server/libraries/net/minecraft/server/1.15.2-20200122.131323/server-1.15.2-20200122.131323-srg.jar is present
[14May2020 22:29:02.286] [main/DEBUG] [net.minecraftforge.fml.loading.LibraryFinder/CORE]: MC Extras at /Users/littlewhite/Desktop/Moded Server/libraries/net/minecraft/server/1.15.2/server-1.15.2-extra.jar is present
[14May2020 22:29:02.286] [main/DEBUG] [net.minecraftforge.fml.loading.LibraryFinder/CORE]: Forge patches at /Users/littlewhite/Desktop/Moded Server/libraries/net/minecraftforge/forge/1.15.2-31.1.0/forge-1.15.2-31.1.0-server.jar is present
[14May2020 22:29:02.289] [main/DEBUG] [net.minecraftforge.fml.loading.LanguageLoadingProvider/CORE]: Found 0 language providers
[14May2020 22:29:02.290] [main/DEBUG] [net.minecraftforge.fml.loading.LanguageLoadingProvider/CORE]: Adding forge as a language from /Users/littlewhite/Desktop/Moded Server/libraries/net/minecraftforge/forge/1.15.2-31.1.0/forge-1.15.2-31.1.0-universal.jar
[14May2020 22:29:02.292] [main/DEBUG] [net.minecraftforge.fml.loading.LanguageLoadingProvider/CORE]: Adding file:/Users/littlewhite/Desktop/Moded%20Server/libraries/net/minecraftforge/forge/1.15.2-31.1.0/forge-1.15.2-31.1.0-universal.jar to languageloader classloader
[14May2020 22:29:02.324] [main/DEBUG] [net.minecraftforge.fml.loading.LanguageLoadingProvider/CORE]: Found 2 language providers
[14May2020 22:29:02.324] [main/DEBUG] [net.minecraftforge.fml.loading.LanguageLoadingProvider/CORE]: Found language provider javafml, version 31.1
[14May2020 22:29:02.326] [main/DEBUG] [net.minecraftforge.fml.loading.LanguageLoadingProvider/CORE]: Found language provider minecraft, version 1
[14May2020 22:29:02.328] [main/DEBUG] [cpw.mods.modlauncher.TransformationServiceDecorator/MODLAUNCHER]: Initialized transformation service fml
[14May2020 22:29:02.328] [main/DEBUG] [cpw.mods.modlauncher.NameMappingServiceHandler/MODLAUNCHER]: Current naming domain is 'srg'
[14May2020 22:29:02.329] [main/DEBUG] [cpw.mods.modlauncher.NameMappingServiceHandler/MODLAUNCHER]: Identified name mapping providers {}
[14May2020 22:29:02.329] [main/DEBUG] [cpw.mods.modlauncher.TransformationServicesHandler/MODLAUNCHER]: Transformation services begin scanning
[14May2020 22:29:02.329] [main/DEBUG] [cpw.mods.modlauncher.TransformationServiceDecorator/MODLAUNCHER]: Beginning scan trigger - transformation service fml
[14May2020 22:29:02.329] [main/DEBUG] [net.minecraftforge.fml.loading.FMLServiceProvider/CORE]: Initiating mod scan
[14May2020 22:29:02.350] [main/DEBUG] [net.minecraftforge.fml.loading.moddiscovery.ModListHandler/CORE]: Found mod coordinates from lists: []
[14May2020 22:29:02.368] [main/DEBUG] [net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer/CORE]: Found Mod Locators : (mods folder:null),(maven libs:null),(exploded directory:null),(minecraft:null)
[14May2020 22:29:02.382] [main/DEBUG] [net.minecraftforge.fml.loading.moddiscovery.ModFileParser/LOADING]: Considering mod file candidate /Users/littlewhite/Desktop/Moded Server/libraries/net/minecraftforge/forge/1.15.2-31.1.0/forge-1.15.2-31.1.0-universal.jar
[14May2020 22:29:02.412] [main/DEBUG] [net.minecraftforge.fml.loading.moddiscovery.ModFileInfo/LOADING]: Found valid mod file forge-1.15.2-31.1.0-universal.jar with {forge} mods - versions {31.1.0}
[14May2020 22:29:02.412] [main/DEBUG] [net.minecraftforge.fml.loading.moddiscovery.ModFile/LOADING]: Loading mod file /Users/littlewhite/Desktop/Moded Server/libraries/net/minecraftforge/forge/1.15.2-31.1.0/forge-1.15.2-31.1.0-universal.jar with language javafml
[14May2020 22:29:02.433] [main/DEBUG] [net.minecraftforge.fml.loading.moddiscovery.ModFileParser/LOADING]: Found coremod fieldtomethodtransformers with Javascript path META-INF/fieldtomethodtransformers.js
[14May2020 22:29:02.433] [main/DEBUG] [net.minecraftforge.fml.loading.moddiscovery.ModFile/LOADING]: Found coremod META-INF/fieldtomethodtransformers.js
[14May2020 22:29:02.434] [main/DEBUG] [net.minecraftforge.fml.loading.moddiscovery.ModFileParser/LOADING]: Considering mod file candidate /Users/littlewhite/Desktop/Moded Server/libraries/net/minecraftforge/forge/1.15.2-31.1.0/forge-1.15.2-31.1.0-server.jar
[14May2020 22:29:02.436] [main/DEBUG] [net.minecraftforge.fml.loading.moddiscovery.ModFileInfo/LOADING]: Found valid mod file forge-1.15.2-31.1.0-server.jar with {minecraft} mods - versions {1.15.2}
[14May2020 22:29:02.436] [main/DEBUG] [net.minecraftforge.fml.loading.moddiscovery.ModFile/LOADING]: Loading mod file /Users/littlewhite/Desktop/Moded Server/libraries/net/minecraftforge/forge/1.15.2-31.1.0/forge-1.15.2-31.1.0-server.jar with language minecraft
[14May2020 22:29:02.443] [main/DEBUG] [net.minecraftforge.fml.loading.ModSorter/LOADING]: Found 0 mandatory requirements
[14May2020 22:29:02.444] [main/DEBUG] [net.minecraftforge.fml.loading.ModSorter/LOADING]: Found 0 mandatory mod requirements missing
[14May2020 22:29:02.526] [main/INFO] [STDERR/]: [jdk.nashorn.api.scripting.NashornScriptEngine:<init>:143]: Warning: Nashorn engine is planned to be removed from a future JDK release
[14May2020 22:29:02.718] [main/DEBUG] [cpw.mods.modlauncher.TransformationServiceDecorator/MODLAUNCHER]: End scan trigger - transformation service fml
[14May2020 22:29:02.719] [main/DEBUG] [cpw.mods.modlauncher.TransformationServicesHandler/MODLAUNCHER]: Transformation services loading transformers
[14May2020 22:29:02.719] [main/DEBUG] [cpw.mods.modlauncher.TransformationServiceDecorator/MODLAUNCHER]: Initializing transformers for transformation service fml
[14May2020 22:29:02.719] [main/DEBUG] [net.minecraftforge.fml.loading.FMLServiceProvider/CORE]: Loading coremod transformers
[14May2020 22:29:02.720] [main/DEBUG] [net.minecraftforge.coremod.CoreModEngine/COREMOD]: Loading CoreMod from META-INF/fieldtomethodtransformers.js
[14May2020 22:29:02.818] [main/DEBUG] [net.minecraftforge.coremod.CoreModEngine/COREMOD]: CoreMod loaded successfully
[14May2020 22:29:02.825] [main/DEBUG] [cpw.mods.modlauncher.TransformStore/MODLAUNCHER]: Adding transformer net.minecraftforge.coremod.transformer.CoreModClassTransformer@5173200b to Target : CLASS {Lnet/minecraft/potion/EffectInstance;} {} {V}
[14May2020 22:29:02.826] [main/DEBUG] [cpw.mods.modlauncher.TransformStore/MODLAUNCHER]: Adding transformer net.minecraftforge.coremod.transformer.CoreModClassTransformer@a10c1b5 to Target : CLASS {Lnet/minecraft/block/FlowingFluidBlock;} {} {V}
[14May2020 22:29:02.827] [main/DEBUG] [cpw.mods.modlauncher.TransformStore/MODLAUNCHER]: Adding transformer net.minecraftforge.coremod.transformer.CoreModClassTransformer@644abb8f to Target : CLASS {Lnet/minecraft/item/BucketItem;} {} {V}
[14May2020 22:29:02.827] [main/DEBUG] [cpw.mods.modlauncher.TransformStore/MODLAUNCHER]: Adding transformer net.minecraftforge.coremod.transformer.CoreModClassTransformer@1a411233 to Target : CLASS {Lnet/minecraft/block/StairsBlock;} {} {V}
[14May2020 22:29:02.827] [main/DEBUG] [cpw.mods.modlauncher.TransformStore/MODLAUNCHER]: Adding transformer net.minecraftforge.coremod.transformer.CoreModClassTransformer@70325d20 to Target : CLASS {Lnet/minecraft/block/FlowerPotBlock;} {} {V}
[14May2020 22:29:02.827] [main/DEBUG] [cpw.mods.modlauncher.TransformStore/MODLAUNCHER]: Adding transformer net.minecraftforge.coremod.transformer.CoreModClassTransformer@7c2327fa to Target : CLASS {Lnet/minecraft/item/FishBucketItem;} {} {V}
[14May2020 22:29:02.827] [main/DEBUG] [cpw.mods.modlauncher.TransformationServiceDecorator/MODLAUNCHER]: Initialized transformers for transformation service fml
[14May2020 22:29:02.836] [main/INFO] [cpw.mods.modlauncher.LaunchServiceHandler/MODLAUNCHER]: Launching target 'fmlserver' with arguments [--gameDir, .]
[14May2020 22:29:03.947] [main/DEBUG] [net.minecraftforge.coremod.transformer.CoreModBaseTransformer/COREMOD]: Transforming net/minecraft/block/FlowingFluidBlock
[14May2020 22:29:04.038] [main/DEBUG] [net.minecraftforge.coremod.transformer.CoreModBaseTransformer/COREMOD]: Transforming net/minecraft/block/StairsBlock
[14May2020 22:29:04.144] [main/DEBUG] [net.minecraftforge.coremod.transformer.CoreModBaseTransformer/COREMOD]: Transforming net/minecraft/block/FlowerPotBlock
[14May2020 22:29:06.838] [main/DEBUG] [net.minecraftforge.coremod.transformer.CoreModBaseTransformer/COREMOD]: Transforming net/minecraft/item/BucketItem
[14May2020 22:29:06.859] [main/DEBUG] [net.minecraftforge.coremod.transformer.CoreModBaseTransformer/COREMOD]: Transforming net/minecraft/item/FishBucketItem
[14May2020 22:29:07.114] [main/DEBUG] [net.minecraftforge.coremod.transformer.CoreModBaseTransformer/COREMOD]: Transforming net/minecraft/potion/EffectInstance
[14May2020 22:29:09.333] [main/WARN] [net.minecraft.command.Commands/]: Ambiguity between arguments [teleport, destination] and [teleport, targets] with inputs: [Player, 0123, @e, dd12be42-52a9-4a91-a8a1-11c01849e498]
[14May2020 22:29:09.336] [main/WARN] [net.minecraft.command.Commands/]: Ambiguity between arguments [teleport, location] and [teleport, destination] with inputs: [0.1 -0.5 .9, 0 0 0]
[14May2020 22:29:09.338] [main/WARN] [net.minecraft.command.Commands/]: Ambiguity between arguments [teleport, location] and [teleport, targets] with inputs: [0.1 -0.5 .9, 0 0 0]
[14May2020 22:29:09.340] [main/WARN] [net.minecraft.command.Commands/]: Ambiguity between arguments [teleport, targets] and [teleport, destination] with inputs: [Player, 0123, dd12be42-52a9-4a91-a8a1-11c01849e498]
[14May2020 22:29:09.357] [main/WARN] [net.minecraft.command.Commands/]: Ambiguity between arguments [teleport, targets, location] and [teleport, targets, destination] with inputs: [0.1 -0.5 .9, 0 0 0]
[14May2020 22:29:11.529] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer/]: Starting minecraft server version 1.15.2
[14May2020 22:29:11.646] [Server thread/DEBUG] [net.minecraftforge.fml.ForgeI18n/CORE]: Loading I18N data entries: 4533
[14May2020 22:29:11.751] [Server thread/ERROR] [net.minecraftforge.eventbus.EventBus/EVENTBUS]: Failed to resolve handler for "net.minecraftforge.fml.network.simple.SimpleChannel$$Lambda$2935/0x000000080150c840@47550e36"
[14May2020 22:29:11.753] [Server thread/ERROR] [net.minecraft.server.MinecraftServer/]: Encountered an unexpected exception
java.lang.ExceptionInInitializerError: null
at net.minecraftforge.fml.ModLoader.<init>(ModLoader.java:121) ~[?:?]
at net.minecraftforge.fml.ModLoader.get(ModLoader.java:146) ~[?:?]
at net.minecraftforge.fml.server.ServerModLoader.begin(ServerModLoader.java:45) ~[?:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:122) ~[?:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:611) [?:?]
at java.lang.Thread.run(Thread.java:832) [?:?]
Caused by: java.lang.IllegalStateException: Failed to resolve consumer event type: net.minecraftforge.fml.network.simple.SimpleChannel$$Lambda$2935/0x000000080150c840@47550e36
at net.minecraftforge.eventbus.EventBus.addListener(EventBus.java:194) ~[eventbus-2.0.0-milestone.1-service.jar:?]
at net.minecraftforge.eventbus.EventBus.addListener(EventBus.java:161) ~[eventbus-2.0.0-milestone.1-service.jar:?]
at net.minecraftforge.eventbus.EventBus.addListener(EventBus.java:156) ~[eventbus-2.0.0-milestone.1-service.jar:?]
at net.minecraftforge.eventbus.EventBus.addListener(EventBus.java:151) ~[eventbus-2.0.0-milestone.1-service.jar:?]
at net.minecraftforge.fml.network.NetworkInstance.addListener(NetworkInstance.java:65) ~[?:?]
at net.minecraftforge.fml.network.simple.SimpleChannel.<init>(SimpleChannel.java:56) ~[?:?]
at net.minecraftforge.fml.network.simple.SimpleChannel.<init>(SimpleChannel.java:49) ~[?:?]
at net.minecraftforge.fml.network.NetworkRegistry$ChannelBuilder.simpleChannel(NetworkRegistry.java:409) ~[?:?]
at net.minecraftforge.fml.network.NetworkInitialization.getHandshakeChannel(NetworkInitialization.java:38) ~[?:?]
at net.minecraftforge.fml.network.FMLNetworkConstants.<clinit>(FMLNetworkConstants.java:48) ~[?:?]
... 6 more
[14May2020 22:29:11.764] [Server thread/ERROR] [net.minecraft.server.MinecraftServer/]: This crash report has been saved to: /Users/littlewhite/Desktop/Moded Server/./crash-reports/crash-2020-05-14_22.29.11-server.txt
[14May2020 22:29:11.807] [Server thread/INFO] [net.minecraft.server.MinecraftServer/]: Stopping server
[14May2020 22:29:11.809] [Server thread/INFO] [net.minecraft.server.MinecraftServer/]: Saving worlds
[14May2020 22:29:11.813] [Server thread/ERROR] [net.minecraft.server.MinecraftServer/]: Exception stopping the server
java.lang.IllegalArgumentException: Can not hotload overworld. This must be loaded at all times by main Server.
at org.apache.commons.lang3.Validate.isTrue(Validate.java:158) ~[server-1.15.2-extra.jar:?]
at net.minecraftforge.common.DimensionManager.initWorld(DimensionManager.java:229) ~[?:?]
at net.minecraftforge.common.DimensionManager.getWorld(DimensionManager.java:198) ~[?:?]
at net.minecraft.server.MinecraftServer.func_71218_a(MinecraftServer.java:1002) ~[?:?]
at net.minecraft.server.MinecraftServer.func_213211_a(MinecraftServer.java:534) ~[?:?]
at net.minecraft.server.MinecraftServer.func_71260_j(MinecraftServer.java:566) ~[?:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71260_j(DedicatedServer.java:549) ~[?:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:674) [?:?]
at java.lang.Thread.run(Thread.java:832) [?:?]