Error while launching minecraft with a custom modpack.

[Corstag]

I have this error while launching minecraft:

The game crashed whilst initializing game Error: java.lang.NoSuchMethodError: net.minecraft.item.ItemStack.isEmpty()Z Exit code: -1

Why can't I play?

This is the full report:

---- Minecraft Crash Report ----

WARNING: coremods are present:
  WolfArmorCore (wolfarmor-1.12.2-3.7.5-universal-signed.jar)
Contact their authors BEFORE contacting forge

// Don't do that.

Time: 10/13/21 5:22 PM
Description: Initializing game

java.lang.NoSuchMethodError: net.minecraft.item.ItemStack.isEmpty()Z
    at net.darkhax.badmobs.handler.ClientEventHandler.onTooltipRendered(ClientEventHandler.java:16)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_97_ClientEventHandler_onTooltipRendered_ItemTooltipEvent.invoke(.dynamic)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
    at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182)
    at net.minecraftforge.event.ForgeEventFactory.onItemTooltip(ForgeEventFactory.java:358)
    at net.minecraft.item.ItemStack.func_82840_a(ItemStack.java:889)
    at net.minecraft.client.Minecraft.lambda$populateSearchTreeManager$1(Minecraft.java:576)
    at net.minecraft.client.Minecraft$$Lambda$174/1942976141.apply(Unknown Source)
    at net.minecraft.client.util.SearchTree.func_194042_b(SourceFile:49)
    at net.minecraft.client.util.SearchTree.func_194043_a(SourceFile:44)
    at net.minecraft.client.Minecraft$$Lambda$176/93016417.accept(Unknown Source)
    at java.lang.Iterable.forEach(Iterable.java:75)
    at net.minecraft.client.Minecraft.func_193986_ar(Minecraft.java:590)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:529)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:378)
    at net.minecraft.client.main.Main.main(SourceFile:123)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    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:
---------------------------------------------------------------------------------------

-- Head --
Thread: Client thread
Stacktrace:
    at net.darkhax.badmobs.handler.ClientEventHandler.onTooltipRendered(ClientEventHandler.java:16)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_97_ClientEventHandler_onTooltipRendered_ItemTooltipEvent.invoke(.dynamic)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
    at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182)
    at net.minecraftforge.event.ForgeEventFactory.onItemTooltip(ForgeEventFactory.java:358)
    at net.minecraft.item.ItemStack.func_82840_a(ItemStack.java:889)
    at net.minecraft.client.Minecraft.lambda$populateSearchTreeManager$1(Minecraft.java:576)
    at net.minecraft.client.Minecraft$$Lambda$174/1942976141.apply(Unknown Source)
    at net.minecraft.client.util.SearchTree.func_194042_b(SourceFile:49)
    at net.minecraft.client.util.SearchTree.func_194043_a(SourceFile:44)
    at net.minecraft.client.Minecraft$$Lambda$176/93016417.accept(Unknown Source)
    at java.lang.Iterable.forEach(Iterable.java:75)
    at net.minecraft.client.Minecraft.func_193986_ar(Minecraft.java:590)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:529)

-- Initialization --
Details:
Stacktrace:
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:378)
    at net.minecraft.client.main.Main.main(SourceFile:123)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
    Minecraft Version: 1.12.2
    Operating System: Windows 10 (amd64) version 10.0
    Java Version: 1.8.0_51, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 670433344 bytes (639 MB) / 1701314560 bytes (1622 MB) up to 3817865216 bytes (3641 MB)
    JVM Flags: 4 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx4096m -Xms256m -XX:PermSize=256m
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: MCP 9.42 Powered by Forge 14.23.5.2855 29 mods loaded, 29 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                                |
    |:----- |:---------------------- |:----------------------- |:--------------------------------------------- |:---------------------------------------- |
    | LCH   | minecraft              | 1.12.2                  | minecraft.jar                                 | None                                     |
    | LCH   | mcp                    | 9.42                    | minecraft.jar                                 | None                                     |
    | LCH   | FML                    | 8.0.99.99               | forge-1.12.2-14.23.5.2855.jar                 | e3c3d50c7c986df74c645c0ac54639741c90a557 |
    | LCH   | forge                  | 14.23.5.2855            | forge-1.12.2-14.23.5.2855.jar                 | e3c3d50c7c986df74c645c0ac54639741c90a557 |
    | LCH   | movillages             | 1.5.4                   | [1.12]MoVillages-1.5.4.jar                    | None                                     |
    | LCH   | jei                    | 4.16.1.302              | jei_1.12.2-4.16.1.302.jar                     | None                                     |
    | LCH   | appleskin              | 1.0.14                  | AppleSkin-mc1.12-1.0.14.jar                   | None                                     |
    | LCH   | badmobs                | 1.1.40                  | BadMobs-1.12.2-1.1.40-deobf.jar               | None                                     |
    | LCH   | biomesoplenty          | 7.0.1.2444              | BiomesOPlenty-1.12.2-7.0.1.2444-universal.jar | None                                     |
    | LCH   | chameleon              | 1.12-4.1.3              | Chameleon-1.12-4.1.3.jar                      | None                                     |
    | LCH   | umm3185118519          | release 1.5 - MC 1.12.2 | Extended+ItemsOres+[1.12.2]+(release+1.5).jar | None                                     |
    | LCH   | cfm                    | 6.3.1                   | furniture-6.3.1-1.12.2.jar                    | None                                     |
    | LCH   | guideapi               | 1.12-2.1.8-63           | Guide-API-1.12-2.1.8-63.jar                   | None                                     |
    | LCH   | howlingmoon            | 0.9                     | howlingmoon-1.12.2-0.9.jar                    | None                                     |
    | LCH   | ironchest              | 1.12.2-7.0.67.844       | ironchest-1.12.2-7.0.72.847.jar               | None                                     |
    | LCH   | journeymap             | 1.12.2-5.7.1            | journeymap-1.12.2-5.7.1.jar                   | None                                     |
    | LCH   | earthenbounty          | 2.1.6                   | just_a_few_more_ores-2.1.6.jar                | None                                     |
    | LCH   | oreexcavation          | 1.4.150                 | OreExcavation-1.4.150.jar                     | None                                     |
    | LCH   | oeintegration          | 2.3.4                   | oeintegration-2.3.4.jar                       | None                                     |
    | LCH   | harvestcraft           | 1.12.2zb                | Pam's+HarvestCraft+1.12.2zg.jar               | None                                     |
    | LCH   | resourceoverhaul       | 2.75                    | Resource+Overhaul2.9+MC1.12.jar               | None                                     |
    | LCH   | sophisticatedwolves    | 3.13.8                  | SophisticatedWolves-1.12.2-3.13.8.jar         | None                                     |
    | LCH   | storagedrawers         | 5.2.2                   | StorageDrawers-1.12.2-5.4.2.jar               | None                                     |
    | LCH   | uteamcore              | 2.2.5.147               | u_team_core-1.12.2-2.2.5.147.jar              | None                                     |
    | LCH   | usefulbackpacks        | 1.5.4.85                | useful_backpacks-1.12.2-1.5.4.85.jar          | None                                     |
    | LCH   | vampirism              | 1.6.2                   | Vampirism-1.12.2-1.6.2.jar                    | None                                     |
    | LCH   | teamlapen-lib          | 1.6.2                   | Vampirism-1.12.2-1.6.2.jar                    | None                                     |
    | LCH   | vampirism_integrations | vampirism_integrations  | VampirismIntegrations-1.12.2-1.3.0.jar        | None                                     |
    | LCH   | wolfarmor              | 3.7.5                   | wolfarmor-1.12.2-3.7.5-universal-signed.jar   | e94e38a605842477f3ec218e6fcf781f6b3f7f89 |

    Loaded coremods (and transformers): 
WolfArmorCore (wolfarmor-1.12.2-3.7.5-universal-signed.jar)
  
    GL info: ' Vendor: 'NVIDIA Corporation' Version: '4.6.0 NVIDIA 496.13' Renderer: 'NVIDIA GeForce RTX 3060 Laptop GPU/PCIe/SSE2'
    Launched Version: forge-14.23.5.2855
    LWJGL: 2.9.4
    OpenGL: NVIDIA GeForce RTX 3060 Laptop GPU/PCIe/SSE2 GL version 4.6.0 NVIDIA 496.13, NVIDIA Corporation
    GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

    Using VBOs: Yes
    Is Modded: Definitely; Client brand changed to 'fml,forge'
    Type: Client (map_client.txt)
    Resource Packs: 
    Current Language: English (US)
    Profiler Position: N/A (disabled)
    CPU: 16x AMD Ryzen 7 5800H with Radeon Graphics