so when i try to join my minecraft server it crasher after about half a secound not sure why, heres the crash report. (my friend can join and i does NOT crash for him)

 

---- Minecraft Crash Report ----

WARNING: coremods are present:
  Inventory Tweaks Coremod (InventoryTweaks-1.63.jar)
  MicdoodlePlugin (MicdoodleCore-1.12.2-4.0.1.181.jar)
  EnderCorePlugin (EnderCore-1.12.2-0.5.31.jar)
  CTMCorePlugin (CTM-MC1.12-0.3.0.15.jar)
  IELoadingPlugin (ImmersiveEngineering-core-0.12-82.jar)
Contact their authors BEFORE contacting forge

// On the bright side, I bought you a teddy bear!

Time: 28-06-18 16:35
Description: Exception in server tick loop

java.lang.NoClassDefFoundError: net/minecraft/client/resources/I18n
    at com.xray.common.XRay.<clinit>(XRay.java:49)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Unknown Source)
    at net.minecraftforge.fml.common.FMLModContainer.constructMod(FMLModContainer.java:528)
    at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91)
    at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150)
    at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76)
    at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399)
    at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71)
    at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)
    at com.google.common.eventbus.EventBus.post(EventBus.java:217)
    at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:218)
    at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:196)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91)
    at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150)
    at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76)
    at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399)
    at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71)
    at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)
    at com.google.common.eventbus.EventBus.post(EventBus.java:217)
    at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:135)
    at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:593)
    at net.minecraftforge.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:97)
    at net.minecraftforge.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:332)
    at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:125)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:486)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.resources.I18n
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 34 more
Caused by: java.lang.NullPointerException
    at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)
    ... 36 more

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
    Minecraft Version: 1.12.2
    Operating System: Windows 10 (x86) version 10.0
    Java Version: 1.8.0_171, Oracle Corporation
    Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
    Memory: 683584320 bytes (651 MB) / 1037959168 bytes (989 MB) up to 1037959168 bytes (989 MB)
    JVM Flags: 2 total; -Xmx1G -Xms1G
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: MCP 9.42 Powered by Forge 14.23.4.2709 53 mods loaded, 53 mods active
    States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored

    | State | ID                                | Version                  | Source                                          | Signature                                |
    |:----- |:--------------------------------- |:------------------------ |:----------------------------------------------- |:---------------------------------------- |
    | UC    | minecraft                         | 1.12.2                   | minecraft.jar                                   | None                                     |
    | UC    | mcp                               | 9.42                     | minecraft.jar                                   | None                                     |
    | UC    | FML                               | 8.0.99.99                | forge-1.12.2-14.23.4.2709-universal.jar         | e3c3d50c7c986df74c645c0ac54639741c90a557 |
    | UC    | forge                             | 14.23.4.2709             | forge-1.12.2-14.23.4.2709-universal.jar         | e3c3d50c7c986df74c645c0ac54639741c90a557 |
    | UC    | micdoodlecore                     |                          | minecraft.jar                                   | None                                     |
    | UC    | uncraftingtable                   | 1.8-beta6                | [1.12]UncraftingTable-1.8-beta6.jar             | None                                     |
    | UC    | actuallyadditions                 | 1.12.2-r135              | ActuallyAdditions-1.12.2-r135.jar               | None                                     |
    | UC    | baubles                           | 1.5.2                    | Baubles-1.12-1.5.2.jar                          | None                                     |
    | UC    | betterbuilderswands               | 0.11.1                   | BetterBuildersWands-1.12-0.11.1.245+69d0d70.jar | None                                     |
    | UC    | botania                           | r1.10-354                | Botania r1.10-354.jar                           | None                                     |
    | UC    | chesttransporter                  | 2.8.8                    | ChestTransporter-1.12.2-2.8.8.jar               | None                                     |
    | UC    | chisel                            | MC1.12.2-0.2.0.31        | Chisel-MC1.12.2-0.2.0.31.jar                    | None                                     |
    | UC    | codechickenlib                    | 3.2.0.345                | CodeChickenLib-1.12.2-3.2.0.345-universal.jar   | f1850c39b2516232a2108a7bd84d1cb5df93b261 |
    | UC    | elevatorid                        | 1.3.6                    | ElevatorMod-1.12.2-1.3.6.jar                    | None                                     |
    | UC    | endercore                         | 1.12.2-0.5.31            | EnderCore-1.12.2-0.5.31.jar                     | None                                     |
    | UC    | jei                               | 4.10.0.198               | jei_1.12.2-4.10.0.198.jar                       | None                                     |
    | UC    | enderio                           | 5.0.26                   | EnderIO-1.12.2-5.0.26.jar                       | None                                     |
    | UC    | enderiointegrationtic             | 5.0.26                   | EnderIO-1.12.2-5.0.26.jar                       | None                                     |
    | UC    | enderiobase                       | 5.0.26                   | EnderIO-1.12.2-5.0.26.jar                       | None                                     |
    | UC    | enderioconduits                   | 5.0.26                   | EnderIO-1.12.2-5.0.26.jar                       | None                                     |
    | UC    | enderioconduitsappliedenergistics | 5.0.26                   | EnderIO-1.12.2-5.0.26.jar                       | None                                     |
    | UC    | enderioconduitsopencomputers      | 5.0.26                   | EnderIO-1.12.2-5.0.26.jar                       | None                                     |
    | UC    | enderioconduitsrefinedstorage     | 5.0.26                   | EnderIO-1.12.2-5.0.26.jar                       | None                                     |
    | UC    | enderiointegrationforestry        | 5.0.26                   | EnderIO-1.12.2-5.0.26.jar                       | None                                     |
    | UC    | enderiointegrationticlate         | 5.0.26                   | EnderIO-1.12.2-5.0.26.jar                       | None                                     |
    | UC    | enderiomachines                   | 5.0.26                   | EnderIO-1.12.2-5.0.26.jar                       | None                                     |
    | UC    | enderiopowertools                 | 5.0.26                   | EnderIO-1.12.2-5.0.26.jar                       | None                                     |
    | UC    | enderstorage                      | 2.4.4.132                | EnderStorage-1.12.2-2.4.4.132-universal.jar     | f1850c39b2516232a2108a7bd84d1cb5df93b261 |
    | UC    | galacticraftcore                  | 4.0.1.181                | GalacticraftCore-1.12.2-4.0.1.181.jar           | None                                     |
    | UC    | galacticraftplanets               | 4.0.1.181                | Galacticraft-Planets-1.12.2-4.0.1.181.jar       | None                                     |
    | UC    | mjrlegendslib                     | 1.12.2-1.1.4             | MJRLegendsLib-1.12.2-1.1.4.jar                  | b02331787272ec3515ebe63ecdeea0d746653468 |
    | UC    | extraplanets                      | 1.12.2-0.4.0             | ExtraPlanets-1.12.2-0.4.0.jar                   | b02331787272ec3515ebe63ecdeea0d746653468 |
    | UC    | extrautils2                       | 1.0                      | extrautils2-1.12-1.7.6.jar                      | None                                     |
    | UC    | zerocore                          | 1.12-0.1.2.2             | zerocore-1.12-0.1.2.2.jar                       | None                                     |
    | UC    | bigreactors                       | 1.12.2-0.4.5.49          | ExtremeReactors-1.12.2-0.4.5.49.jar             | None                                     |
    | UC    | guideapi                          | 1.12-2.1.5-60            | Guide-API-1.12-2.1.5-60.jar                     | None                                     |
    | UC    | inventorytweaks                   | 1.63+release.109.220f184 | InventoryTweaks-1.63.jar                        | 55d2cd4f5f0961410bf7b91ef6c6bf00a766dcbe |
    | UC    | ironchest                         | 1.12.2-7.0.40.824        | ironchest-1.12.2-7.0.40.824.jar                 | None                                     |
    | UC    | journeymap                        | 1.12.2-5.5.2             | journeymap-1.12.2-5.5.2.jar                     | None                                     |
    | UC    | mcjtylib_ng                       | 3.0.2                    | mcjtylib-1.12-3.0.2.jar                         | None                                     |
    | UC    | mekanism                          | 1.12.2-9.4.13.349        | Mekanism-1.12.2-9.4.13.349.jar                  | None                                     |
    | UC    | mekanismgenerators                | 9.4.11                   | MekanismGenerators-1.12.2-9.4.13.349.jar        | None                                     |
    | UC    | mekanismtools                     | 9.4.11                   | MekanismTools-1.12.2-9.4.13.349.jar             | None                                     |
    | UC    | morpheus                          | 1.12-3.3.2               | Morpheus-1.12-3.3.2.jar                         | None                                     |
    | UC    | projecte                          | 1.12-PE1.3.0             | ProjectE-1.12-PE1.3.0.jar                       | None                                     |
    | UC    | xreliquary                        | 1.12.2-1.3.4.767         | Reliquary-1.12.2-1.3.4.767.jar                  | None                                     |
    | UC    | rftools                           | 7.54                     | rftools-1.12-7.54.jar                           | None                                     |
    | UC    | vampirism                         | 1.4.2                    | Vampirism-1.12.2-1.4.2.jar                      | None                                     |
    | UC    | teamlapen-lib                     | 1.4.2                    | Vampirism-1.12.2-1.4.2.jar                      | None                                     |
    | UC    | vampirism_integrations            | vampirism_integrations   | VampirismIntegrations-1.12.2-1.0.0.jar          | None                                     |
    | UC    | wawla                             | 2.5.257                  | Wawla-1.12.2-2.5.257.jar                        | d476d1b22b218a10d845928d1665d45fce301b27 |
    | U     | xray                              | 1.4.0                    | xray-1.12.2-1.4.2.jar                           | None                                     |
    | U     | immersiveengineering              | 0.12-82                  | ImmersiveEngineering-0.12-82.jar                | None                                     |

    Loaded coremods (and transformers):
Inventory Tweaks Coremod (InventoryTweaks-1.63.jar)
  invtweaks.forge.asm.ContainerTransformer
MicdoodlePlugin (MicdoodleCore-1.12.2-4.0.1.181.jar)
  micdoodle8.mods.miccore.MicdoodleTransformer
EnderCorePlugin (EnderCore-1.12.2-0.5.31.jar)
  com.enderio.core.common.transform.EnderCoreTransformer
  com.enderio.core.common.transform.SimpleMixinPatcher
CTMCorePlugin (CTM-MC1.12-0.3.0.15.jar)
  team.chisel.ctm.client.asm.CTMTransformer
IELoadingPlugin (ImmersiveEngineering-core-0.12-82.jar)
  blusunrize.immersiveengineering.common.asm.IEClassTransformer
    Profiler Position: N/A (disabled)
    Is Modded: Definitely; Server brand changed to 'fml,forge'
    Type: Dedicated Server (map_server.txt)

Remove xray mod from the server and try again, looks like it's trying to read client stuff, which doesn't exist on the server.