Hi, I'm presented with an error upon launching Minecraft 1.15.2 with Forge (1.15.2-forge-31.1.0) the windows says :

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

and when I open the logs I have this :

 

Spoiler

 

---- Minecraft Crash Report ----
// Who set us up the TNT?

Time: 04/03/20 17:21
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$$Lambda$2750/583038983.accept(Unknown Source) ~[?:?] {}
    at net.minecraftforge.fml.ModLoader.lambda$loadMods$14(ModLoader.java:158) ~[?:?] {re:classloading}
    at net.minecraftforge.fml.ModLoader$$Lambda$2829/474179181.run(Unknown Source) ~[?:?] {}
    at net.minecraft.resources.AsyncReloader.func_219557_a(SourceFile:71) ~[?:?] {re:classloading}
    at net.minecraft.resources.AsyncReloader$$Lambda$2827/407336925.run(Unknown Source) ~[?:?] {}
    at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213166_h(ThreadTaskExecutor.java:173) ~[?:?] {re:classloading,pl:accesstransformer:B,xf:OptiFine:default}
    at net.minecraft.util.concurrent.RecursiveEventLoop.func_213166_h(SourceFile:23) ~[?:?] {re:classloading}
    at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213168_p(ThreadTaskExecutor.java:135) ~[?:?] {re:classloading,pl:accesstransformer:B,xf:OptiFine:default}
    at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213160_bf(ThreadTaskExecutor.java:115) ~[?:?] {re:classloading,pl:accesstransformer:B,xf:OptiFine:default}
    at net.minecraft.client.Minecraft.func_195542_b(Minecraft.java:898) [?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:554) [?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.client.main.Main.main(SourceFile:204) [?:?] {re:classloading}
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_51] {}
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_51] {}
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_51] {}
    at java.lang.reflect.Method.invoke(Method.java:497) ~[?:1.8.0_51] {}
    at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:56) [forge-1.15.2-31.1.0.jar:31.1] {}
    at net.minecraftforge.fml.loading.FMLClientLaunchProvider$$Lambda$397/1826747905.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: 711401056 bytes (678 MB) / 2147483648 bytes (2048 MB) up to 2147483648 bytes (2048 MB)
    CPUs: 8
    JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -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_pre9.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: Intel(R) UHD Graphics 630 GL version 4.5.0 - Build 25.20.100.6446, Intel
    GL Caps: Using framebuffer using OpenGL 3.0
    Using VBOs: Yes
    Is Modded: Definitely; Client brand changed to 'forge'
    Type: Client (map_client.txt)

 

I tried using the latest forge installer at first and got the same issue, this report is from the recommended version.

Thanks in advance

Edited March 4, 20205 yr by ibagit_

I seem to get the same error code with the latest recommended version of forge for 1.15.2 yet I deleted all my optifine files out of my recent downloads folder and I still get the same error code. Please help.

4 minutes ago, Locodegree said:

I seem to get the same error code with the latest recommended version of forge for 1.15.2 yet I deleted all my optifine files out of my recent downloads folder and I still get the same error code. Please help.

Please start your own thread, and post your debug.log as described in the EAQ