Here is my bug report 

---- Minecraft Crash Report ----
// Hi. I'm Minecraft, and I'm a crashaholic.

Time: 10/6/19 10:52 PM
Description: Exception in server tick loop

java.lang.IllegalArgumentException: bound must be positive
    at java.util.Random.nextInt(Random.java:388)
    at com.pixelmonmod.pixelmon.RandomHelper.useRandomForNumberBetween(RandomHelper.java:72)
    at com.pixelmonmod.pixelmon.RandomHelper.getRandomNumberBetween(RandomHelper.java:23)
    at com.pixelmonmod.pixelmon.api.spawning.AbstractSpawner.getTrackedBlockCollection(AbstractSpawner.java:207)
    at com.pixelmonmod.pixelmon.spawning.PlayerTrackingSpawner.getSpawns(PlayerTrackingSpawner.java:136)
    at com.pixelmonmod.pixelmon.api.spawning.archetypes.spawners.TickingSpawner.doPass(TickingSpawner.java:89)
    at com.pixelmonmod.pixelmon.api.spawning.SpawnerCoordinator.onTick(SpawnerCoordinator.java:50)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_109_SpawnerCoordinator_onTick_ServerTickEvent.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.fml.common.FMLCommonHandler.onPostServerTick(FMLCommonHandler.java:266)
    at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:712)
    at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:185)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526)
    at java.lang.Thread.run(Thread.java:745)

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 (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: 133867296 bytes (127 MB) / 1107296256 bytes (1056 MB) up to 2147483648 bytes (2048 MB)
    JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: MCP 9.42 Powered by Forge 14.23.5.2838 5 mods loaded, 5 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                                |
    |:------ |:--------- |:------------ |:----------------------------------- |:---------------------------------------- |
    | LCHIJA | minecraft | 1.12.2       | minecraft.jar                       | None                                     |
    | LCHIJA | mcp       | 9.42         | minecraft.jar                       | None                                     |
    | LCHIJA | FML       | 8.0.99.99    | forge-1.12.2-14.23.5.2838.jar       | e3c3d50c7c986df74c645c0ac54639741c90a557 |
    | LCHIJA | forge     | 14.23.5.2838 | forge-1.12.2-14.23.5.2838.jar       | e3c3d50c7c986df74c645c0ac54639741c90a557 |
    | LCHIJA | pixelmon  | 7.0.7        | Pixelmon-1.12.2-7.0.7-universal.jar | None                                     |

    Loaded coremods (and transformers): 
    GL info: ~~ERROR~~ RuntimeException: No OpenGL context found in the current thread.
    Profiler Position: N/A (disabled)
    Player Count: 1 / 8; [EntityPlayerMP['RyLo11'/73, l='Pokemon Red', x=10017.85, y=184.00, z=10069.88]]
    Type: Integrated Server (map_client.txt)
    Is Modded: Definitely; Client brand changed to 'fml,forge'

Please tell me what's wrong and do it in stupid person language cause I have no clue what any of this means. I could access the maps  before and yes I do have a good enough cpu. This is an issue with forge and not vanilla minecraft.

14 minutes ago, rylo11 said:

This is an issue with forge and not vanilla minecraft.

This isn't true this is something wrong with pixelmon either you have configured something wrong or it's a bug and needs to be alerted to them. I can't diagnose it entirely because pixelmon is not open source and all I can tell you is that they are trying to generate a random number with an incorrect parameter.

Just now, Animefan8888 said:

This isn't true this is something wrong with pixelmon either you have configured something wrong or it's a bug and needs to be alerted to them. I can't diagnose it entirely because pixelmon is not open source and all I can tell you is that they are trying to generate a random number with an incorrect parameter.

Sorry, I meant its an issue with Pixelmon on forge, The  crash did occur when i was editing the config for Pixelmon. I assumed this was the reason but I have no way of changing it. Wait, maybe i do hold on i think i might be big brain

6 minutes ago, Animefan8888 said:

This isn't true this is something wrong with pixelmon either you have configured something wrong or it's a bug and needs to be alerted to them. I can't diagnose it entirely because pixelmon is not open source and all I can tell you is that they are trying to generate a random number with an incorrect parameter.

Thanks a lot, I realized that if i reset to default settings in the game start screen i could fix it without needing to be ingame. Appreciate it.

Just now, rylo11 said:

Thanks a lot, I realized that if i reset to default settings in the game start screen i could fix it without needing to be ingame. Appreciate it.

You should still report that to the pixelmon devs. Because you being allowed to get that error is a bug and should be fixed.