I have tried running multiple versions of forge when getting 1.15.2 to work. Neither of the 2 or 3 that I have attempted has worked This is a crash report from forge version 1.15.2-31.1.0

 

The game crashed whilst unexpected error Error: java.lang.NoSuchMethodError: net.minecraft.client.renderer.entity.EntityRendererManager.validateRendererExistence()V

 

I have read some other forums talking about how forge will not run with optifine, which made sense because I had a recent version of optifine downloaded, but even after I deleted it out of my recent downloads folder, and try to start the game with forge I got the same error. So I'm really kind of stuck on what to do. I've also read some forums that maybe I needed to allocate more memory, but I'm positive that 8GB would be plenty, which is what I have allocated.

 

I also see that in this crash log there is optifine listed in some lines, but I deleted it before I tried to run this. (At least I thought I did). 

 

Here is the crash log-

 

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

Time: 4/11/20 10:11 AM
Description: Unexpected error

java.lang.NoSuchMethodError: net.minecraft.client.renderer.entity.EntityRendererManager.validateRendererExistence()V
    at net.minecraftforge.fml.client.registry.RenderingRegistry.loadEntityRenderers(RenderingRegistry.java:50) ~[?:?] {re:classloading}
    at net.minecraftforge.fml.client.ClientModLoader.postSidedRunnable(ClientModLoader.java:127) ~[?:?] {re:classloading,pl:runtimedistcleaner:A}
    at net.minecraftforge.fml.client.ClientModLoader$$Lambda$2754/1413098536.accept(Unknown Source) ~[?:?] {}
    at net.minecraftforge.fml.ModLoader.lambda$loadMods$14(ModLoader.java:158) ~[?:?] {re:classloading}
    at net.minecraftforge.fml.ModLoader$$Lambda$2833/952031045.run(Unknown Source) ~[?:?] {}
    at net.minecraft.resources.AsyncReloader.func_219557_a(SourceFile:71) ~[?:?] {re:classloading}
    at net.minecraft.resources.AsyncReloader$$Lambda$2831/968912190.run(Unknown Source) ~[?:?] {}
    at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213166_h(ThreadTaskExecutor.java:173) ~[?:?] {re:classloading,pl:accesstransformer:B,xf:OptiFine:default}
    at net.minecraft.util.concurrent.RecursiveEventLoop.func_213166_h(SourceFile:23) ~[?:?] {re:classloading}
    at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213168_p(ThreadTaskExecutor.java:135) ~[?:?] {re:classloading,pl:accesstransformer:B,xf:OptiFine:default}
    at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213160_bf(ThreadTaskExecutor.java:115) ~[?:?] {re:classloading,pl:accesstransformer:B,xf:OptiFine:default}
    at net.minecraft.client.Minecraft.func_195542_b(Minecraft.java:898) [?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:554) [?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.client.main.Main.main(SourceFile:204) [?:?] {re:classloading}
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51] {}
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_51] {}
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_51] {}
    at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_51] {}
    at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:56) [forge-1.15.2-31.1.0.jar:31.1] {}
    at net.minecraftforge.fml.loading.FMLClientLaunchProvider$$Lambda$389/137123763.call(Unknown Source) [forge-1.15.2-31.1.0.jar:31.1] {}
    at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-5.0.0-milestone.4.jar:?] {}
    at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-5.0.0-milestone.4.jar:?] {}
    at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-5.0.0-milestone.4.jar:?] {}
    at cpw.mods.modlauncher.Launcher.run(Launcher.java:81) [modlauncher-5.0.0-milestone.4.jar:?] {}
    at cpw.mods.modlauncher.Launcher.main(Launcher.java:65) [modlauncher-5.0.0-milestone.4.jar:?] {}

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

-- System Details --
Details:
    Minecraft Version: 1.15.2
    Minecraft Version ID: 1.15.2
    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: 5701557032 bytes (5437 MB) / 8556380160 bytes (8160 MB) up to 8589934592 bytes (8192 MB)
    CPUs: 12
    JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx8G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
    ModLauncher: 5.0.0-milestone.4+67+b1a340b
    ModLauncher launch target: fmlclient
    ModLauncher naming: srg
    ModLauncher services: 
        /eventbus-2.0.0-milestone.1-service.jar eventbus PLUGINSERVICE 
        /forge-1.15.2-31.1.0.jar object_holder_definalize PLUGINSERVICE 
        /forge-1.15.2-31.1.0.jar runtime_enum_extender PLUGINSERVICE 
        /accesstransformers-2.0.0-milestone.1-shadowed.jar accesstransformer PLUGINSERVICE 
        /forge-1.15.2-31.1.0.jar capability_inject_definalize PLUGINSERVICE 
        /forge-1.15.2-31.1.0.jar runtimedistcleaner PLUGINSERVICE 
        /preview_OptiFine_1.15.2_HD_U_G1_pre1.jar OptiFine TRANSFORMATIONSERVICE 
        /forge-1.15.2-31.1.0.jar fml TRANSFORMATIONSERVICE 
    FML: 31.1
    Forge: net.minecraftforge:31.1.0
    FML Language Providers: 
        [email protected]
        minecraft@1
    Mod List: 
        forge-1.15.2-31.1.0-client.jar Minecraft {[email protected] ENQUEUE_IMC}
        forge-1.15.2-31.1.0-universal.jar Forge {[email protected] ENQUEUE_IMC}
    Launched Version: 1.15.2-forge-31.1.0
    Backend library: LWJGL version 3.2.2 build 10
    Backend API: GeForce GTX 1660 Ti/PCIe/SSE2 GL version 4.6.0 NVIDIA 436.15, NVIDIA Corporation
    GL Caps: Using framebuffer using OpenGL 3.0
    Using VBOs: Yes
    Is Modded: Definitely; Client brand changed to 'forge'
    Type: Client (map_client.txt)
    Resource Packs: 
    Current Language: ~~ERROR~~ NullPointerException: null
    CPU: 12x AMD Ryzen 5 3600 6-Core Processor 
    OptiFine Version: OptiFine_1.15.2_HD_U_G1_pre1
    OptiFine Build: 20200213-173014
    Render Distance Chunks: 16
    Mipmaps: 4
    Anisotropic Filtering: 1
    Antialiasing: 0
    Multitexture: false
    Shaders: null
    OpenGlVersion: 4.6.0 NVIDIA 436.15
    OpenGlRenderer: GeForce GTX 1660 Ti/PCIe/SSE2
    OpenGlVendor: NVIDIA Corporation
    CpuCount: 12

 

 

Thanks in advance,

-Loco

2 minutes ago, Locodegree said:

 /preview_OptiFine_1.15.2_HD_U_G1_pre1.jar OptiFine TRANSFORMATIONSERVICE

Make sure to read the changelog for Optifine, it tells you what versions of forge it works with.

There is no forge compatible version of Optifine for 1.15.2 yet.

Where would I find that in my files so that I could delete it? I thought I deleted it out of my recent downloads folder, but I may of just deleted it out of that folder, and not off my system. I had trouble finding it anywhere else.

3 minutes ago, Locodegree said:

Where would I find that in my files so that I could delete it?

In your minecraft game directory mods folder. The default is the .minecraft folder in your home directory AppData\Roaming (on windows)

I got it finally, thanks alot man, appreciate it.