I am running a Minecraft 1.12.2 Forge Server with the following mods:
-Pixelmon (v7.0.8)
-Pixelmon Extras (v7.0.8)
-Gameshark (v5.2.4b)
-TGC (v4.0.1)
-TrainerCommands (v2.5.0)
-WonderTrade (v4.6.2)
 I download the mods from their official website. Every time I approach or try to use the Ranch Block, the server crashes. I use 4G of RAM to run the server and there is no lag.
(Excuse me if my english is bad or the sentences are a bit confusing, I'm from Brazil and I don't speak english very well... Also, this is my first time using this forum).

Crash Report:

 

---- Minecraft Crash Report ----
// Why did you do that?

Time: 06/11/19 04:11
Description: Ticking block entity

java.lang.NoSuchMethodError: net.minecraftforge.fml.relauncher.ReflectionHelper.getPrivateValue(Ljava/lang/Class;Ljava/lang/Object;Ljava/lang/String;Ljava/lang/String;)Ljava/lang/Object;
    at com.pixelmonmod.pixelmon.entities.pixelmon.EntityBreeding.<clinit>(EntityBreeding.java:64)
    at com.pixelmonmod.pixelmon.blocks.tileEntities.TileEntityRanchBlock.trySpawnPokes(TileEntityRanchBlock.java:549)
    at com.pixelmonmod.pixelmon.blocks.tileEntities.TileEntityRanchBlock.func_73660_a(TileEntityRanchBlock.java:166)
    at net.minecraft.world.World.func_72939_s(World.java:1835)
    at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:613)
    at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:767)
    at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:397)
    at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526)
    at java.lang.Thread.run(Unknown Source)

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

-- Head --
Thread: Server thread
Stacktrace:
    at com.pixelmonmod.pixelmon.entities.pixelmon.EntityBreeding.<clinit>(EntityBreeding.java:64)
    at com.pixelmonmod.pixelmon.blocks.tileEntities.TileEntityRanchBlock.trySpawnPokes(TileEntityRanchBlock.java:549)
    at com.pixelmonmod.pixelmon.blocks.tileEntities.TileEntityRanchBlock.func_73660_a(TileEntityRanchBlock.java:166)

-- Block entity being ticked --
Details:
    Name: pixelmon:ranch_block // com.pixelmonmod.pixelmon.blocks.tileEntities.TileEntityRanchBlock
    Block type: ID #261 (tile.ranch // com.pixelmonmod.pixelmon.blocks.ranch.BlockRanchBlock // pixelmon:ranch)
    Block data value: 10 / 0xA / 0b1010
    Block location: World: (292,68,41), Chunk: (at 4,4,9 in 18,2; contains blocks 288,0,32 to 303,255,47), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
    Actual block type: ID #261 (tile.ranch // com.pixelmonmod.pixelmon.blocks.ranch.BlockRanchBlock // pixelmon:ranch)
    Actual block data value: 10 / 0xA / 0b1010
Stacktrace:
    at net.minecraft.world.World.func_72939_s(World.java:1835)
    at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:613)

-- Affected level --
Details:
    Level name: world
    All players: 1 total; [EntityPlayerMP['noobcraft'/10, l='world', x=292,21, y=68,00, z=44,68]]
    Chunk stats: ServerChunkCache: 667 Drop: 0
    Level seed: -1888554411824812988
    Level generator: ID 00 - default, ver 1. Features enabled: true
    Level generator options: 
    Level spawn location: World: (236,64,8), Chunk: (at 12,4,8 in 14,0; contains blocks 224,0,0 to 239,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
    Level time: 778439 game time, 1012427 day time
    Level dimension: 0
    Level storage version: 0x04ABD - Anvil
    Level weather: Rain time: 93588 (now: false), thunder time: 47037 (now: false)
    Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
    at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:767)
    at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:397)
    at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526)
    at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
    Minecraft Version: 1.12.2
    Operating System: Windows 10 (amd64) version 10.0
    Java Version: 1.8.0_231, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 2207492576 bytes (2105 MB) / 2747269120 bytes (2620 MB) up to 3817865216 bytes (3641 MB)
    JVM Flags: 2 total; -Xms2G -Xmx4G
    IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
    FML: MCP 9.42 Powered by Forge 14.23.5.2768 10 mods loaded, 10 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                                |
    |:--------- |:--------------- |:---------------------- |:------------------------------------------ |:---------------------------------------- |
    | UCHIJAAAA | minecraft       | 1.12.2                 | minecraft.jar                              | None                                     |
    | UCHIJAAAA | mcp             | 9.42                   | minecraft.jar                              | None                                     |
    | UCHIJAAAA | FML             | 8.0.99.99              | forge-1.12.2-14.23.5.2768-universal.jar    | e3c3d50c7c986df74c645c0ac54639741c90a557 |
    | UCHIJAAAA | forge           | 14.23.5.2768           | forge-1.12.2-14.23.5.2768-universal.jar    | e3c3d50c7c986df74c645c0ac54639741c90a557 |
    | UCHIJAAAA | pixelmon        | 7.0.8                  | Pixelmon-1.12.2-7.0.8-universal.jar        | None                                     |
    | UCHIJAAAA | gameshark       | 5.2.4                  | Gameshark-1.12.2-5.2.4b-universal.jar      | None                                     |
    | UCHIJAAAA | pixelextras     | 2.5.3                  | PixelExtras-1.12.2-2.5.3-universal.jar     | None                                     |
    | UCHIJAAAA | tcg             | 1.12.2-4.0.1-universal | TCG-1.12.2-4.0.1-universal.jar             | None                                     |
    | UCHIJAAAA | trainercommands | 2.5.0                  | TrainerCommands-1.12.2-2.5.0-universal.jar | None                                     |
    | UCHIJAAAA | wondertrade     | 4.6.2                  | WonderTrade-1.12.2-4.6.2-universal.jar     | None                                     |

    Loaded coremods (and transformers): 
    Profiler Position: N/A (disabled)
    Player Count: 1 / 20; [EntityPlayerMP['noobcraft'/10, l='world', x=292,21, y=68,00, z=44,68]]
    Is Modded: Definitely; Server brand changed to 'fml,forge'
    Type: Dedicated Server (map_server.txt)

16 hours ago, diesieben07 said:

 

Pixelmon unfortunately does not encode this requirement in their mod metadata, so it just crashes instead of showing a descriptive error message.

Please report this bug to the pixelmon authors.

So, i just need to update my Forge to version 2838?
Edit: Updated ther server and it worked, thank you!

Edited November 7, 20195 yr by noobcraft