Hi, 

I recently added some mods to my game and tried to add Not enough items but it seems to make my game crash... I don't know anything about computers and stuff, help would be appreciated! 
Here is the crash report : 
 

---- Minecraft Crash Report ----

WARNING: coremods are present:
  llibrary (llibrary-core-1.0.8-1.12.2.jar)
Contact their authors BEFORE contacting forge

// But it works on my machine.

Time: 3/24/19 6:53 PM
Description: There was a severe problem during mod loading that has caused the game to fail

net.minecraftforge.fml.common.LoaderExceptionModCrash: Caught exception from Not Enough Items (nei)
Caused by: java.lang.IllegalAccessError: tried to access class net.minecraft.potion.PotionHelper$MixPredicate from class codechicken.nei.util.helper.potion.PotionRecipeHelper
    at codechicken.nei.util.helper.potion.PotionRecipeHelper.init(PotionRecipeHelper.java:61)
    at codechicken.nei.init.NEIInitialization.bootNEI(NEIInitialization.java:67)
    at codechicken.nei.proxy.ProxyClient.loadComplete(ProxyClient.java:54)
    at codechicken.nei.NotEnoughItems.loadComplete(NotEnoughItems.java:62)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at net.minecraftforge.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:624)
    at sun.reflect.GeneratedMethodAccessor13.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91)
    at com.google.common.eventbus.Subscriber$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.initializeMods(Loader.java:752)
    at net.minecraftforge.fml.client.FMLClientHandler.finishMinecraftLoading(FMLClientHandler.java:336)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:534)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:377)
    at net.minecraft.client.main.Main.main(SourceFile:123)
    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 net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

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_161, Oracle Corporation
    Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
    Memory: 216620600 bytes (206 MB) / 520552448 bytes (496 MB) up to 523501568 bytes (499 MB)
    JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: MCP 9.42 Powered by Forge 14.23.5.2768 11 mods loaded, 11 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                                |
    |:------- |:-------------- |:------------ |:--------------------------------------------- |:---------------------------------------- |
    | UCHIJA  | minecraft      | 1.12.2       | minecraft.jar                                 | None                                     |
    | UCHIJA  | mcp            | 9.42         | minecraft.jar                                 | None                                     |
    | UCHIJA  | FML            | 8.0.99.99    | forge-1.12.2-14.23.5.2768.jar                 | e3c3d50c7c986df74c645c0ac54639741c90a557 |
    | UCHIJA  | forge          | 14.23.5.2768 | forge-1.12.2-14.23.5.2768.jar                 | e3c3d50c7c986df74c645c0ac54639741c90a557 |
    | UCHIJA  | biomesoplenty  | 7.0.1.2361   | BiomesOPlenty-1.12.2-7.0.1.2361-universal.jar | None                                     |
    | UCHIJA  | codechickenlib | 3.2.2.353    | CodeChickenLib-1.12.2-3.2.2.353-universal.jar | f1850c39b2516232a2108a7bd84d1cb5df93b261 |
    | UCHIJA  | llibrary       | 1.7.15       | LLibrary-1.12.2.jar                           | b9f30a813bee3b9dd5652c460310cfcd54f6b7ec |
    | UCHIJA  | iceandfire     | 1.7.0        | iceandfire-1.7.0-1.12.2.jar                   | None                                     |
    | UCHIJA  | jei            | 4.15.0.268   | jei_1.12.2-4.15.0.268.jar                     | None                                     |
    | UCHIJA  | journeymap     | 1.12.2-5.5.2 | JourneyMap-Mod-1.12.2-Unlimited.jar           | None                                     |
    | UCHIJEE | nei            | 2.4.1        | NotEnoughItems-1.12.2-2.4.1.233-universal.jar | f1850c39b2516232a2108a7bd84d1cb5df93b261 |

    Loaded coremods (and transformers): 
llibrary (llibrary-core-1.0.8-1.12.2.jar)
  net.ilexiconn.llibrary.server.core.plugin.LLibraryTransformer
  net.ilexiconn.llibrary.server.core.patcher.LLibraryRuntimePatcher
    GL info: ' Vendor: 'Intel' Version: '4.4.0 - Build 20.19.15.4364' Renderer: 'Intel(R) HD Graphics 520'

Oh ! Annnd how would I do that? @diesieben07 

Alright I'll try! Thanks