[SOLVED]Please help for a new modder.

[jkPlayer998]

I started making my first mod, added a few blocks and items and everything worked perfectly, but then I downloaded an example mod, because its easier  to learn concepts for minecraft modding. Then I imported the project into Intellij, executed the genintellijruns task and finally clicked on run client. But then the build crashed with exit code 255.

Everything worked perfectly until this part. Can anyone tell me what's wrong?

[23:17:19] [Render thread/INFO] [mojang/YggdrasilAuthenticationService]: Environment: authHost='https://authserver.mojang.com', accountsHost='https://api.mojang.com', sessionHost='https://sessionserver.mojang.com', servicesHost='https://api.minecraftservices.com', name='PROD'
[23:17:20] [Render thread/ERROR] [minecraft/Minecraft]: Failed to verify authentication
com.mojang.authlib.exceptions.AuthenticationUnavailableException: null
	at com.mojang.authlib.yggdrasil.YggdrasilSocialInteractionsService.checkPrivileges(YggdrasilSocialInteractionsService.java:97) ~[authlib-2.1.28.jar:?] {}
	at com.mojang.authlib.yggdrasil.YggdrasilSocialInteractionsService.<init>(YggdrasilSocialInteractionsService.java:40) ~[authlib-2.1.28.jar:?] {}
	at com.mojang.authlib.yggdrasil.YggdrasilAuthenticationService.createSocialInteractionsService(YggdrasilAuthenticationService.java:152) ~[authlib-2.1.28.jar:?] {re:classloading}
	at net.minecraft.client.Minecraft.func_244735_a(Minecraft.java:556) ~[forge-1.16.4-35.1.0_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.<init>(Minecraft.java:388) ~[forge-1.16.4-35.1.0_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.main.Main.main(Main.java:149) ~[forge-1.16.4-35.1.0_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_282] {}
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_282] {}
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_282] {}
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_282] {}
	at net.minecraftforge.userdev.FMLUserdevClientLaunchProvider.lambda$launchService$0(FMLUserdevClientLaunchProvider.java:52) ~[forge-1.16.4-35.1.0_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.6.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.6.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.6.jar:?] {}
	at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.6.jar:?] {}
	at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.6.jar:?] {}
	at net.minecraftforge.userdev.LaunchTesting.main(LaunchTesting.java:105) [forge-1.16.4-35.1.0_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {}
[23:17:20] [Render thread/INFO] [minecraft/Minecraft]: Setting user: Dev
[23:17:21] [Render thread/INFO] [minecraft/Minecraft]: Backend library: LWJGL version 3.2.1 build 12
[23:17:21] [Render thread/INFO] [STDOUT/]: [net.minecraft.util.registry.Bootstrap:printToSYSOUT:130]: ---- Minecraft Crash Report ----
// Shall we play a game?

Time: 3/30/21 11:17 PM
Description: Initializing game

java.lang.IllegalStateException: GLFW error before init: [0x10008]Cocoa: Failed to find service port for display
	at com.mojang.blaze3d.platform.GLX.lambda$_initGlfw$1(GLX.java:73) ~[forge-1.16.4-35.1.0_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.MainWindow.checkGlfwError(MainWindow.java:131) ~[forge-1.16.4-35.1.0_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at com.mojang.blaze3d.platform.GLX._initGlfw(GLX.java:72) ~[forge-1.16.4-35.1.0_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at com.mojang.blaze3d.systems.RenderSystem.initBackendSystem(RenderSystem.java:586) ~[forge-1.16.4-35.1.0_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.<init>(Minecraft.java:421) ~[forge-1.16.4-35.1.0_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.main.Main.main(Main.java:149) ~[forge-1.16.4-35.1.0_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_282] {}
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_282] {}
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_282] {}
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_282] {}
	at net.minecraftforge.userdev.FMLUserdevClientLaunchProvider.lambda$launchService$0(FMLUserdevClientLaunchProvider.java:52) ~[forge-1.16.4-35.1.0_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.6.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.6.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.6.jar:?] {}
	at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.6.jar:?] {}
	at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.6.jar:?] {}
	at net.minecraftforge.userdev.LaunchTesting.main(LaunchTesting.java:105) [forge-1.16.4-35.1.0_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {}


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

-- Head --
Thread: Render thread
Stacktrace:
	at com.mojang.blaze3d.platform.GLX.lambda$_initGlfw$1(GLX.java:73) ~[forge:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.MainWindow.checkGlfwError(MainWindow.java:131) ~[forge:?] {re:classloading,pl:runtimedistcleaner:A}
	at com.mojang.blaze3d.platform.GLX._initGlfw(GLX.java:72) ~[forge:?] {re:classloading,pl:runtimedistcleaner:A}
	at com.mojang.blaze3d.systems.RenderSystem.initBackendSystem(RenderSystem.java:586) ~[forge:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.<init>(Minecraft.java:421) ~[forge:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
-- Initialization --
Details:
Stacktrace:
	at net.minecraft.client.main.Main.main(Main.java:149) ~[forge-1.16.4-35.1.0_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_282] {}
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_282] {}
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_282] {}
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_282] {}
	at net.minecraftforge.userdev.FMLUserdevClientLaunchProvider.lambda$launchService$0(FMLUserdevClientLaunchProvider.java:52) ~[forge-1.16.4-35.1.0_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.0.6.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.0.6.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.0.6.jar:?] {}
	at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.0.6.jar:?] {}
	at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.0.6.jar:?] {}
	at net.minecraftforge.userdev.LaunchTesting.main(LaunchTesting.java:105) [forge-1.16.4-35.1.0_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {}


-- System Details --
Details:
	Minecraft Version: 1.16.4
	Minecraft Version ID: 1.16.4
	Operating System: Mac OS X (x86_64) version 10.16
	Java Version: 1.8.0_282, AdoptOpenJDK
	Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), AdoptOpenJDK
	Memory: 432884480 bytes (412 MB) / 1714421760 bytes (1635 MB) up to 3817865216 bytes (3641 MB)
	CPUs: 8
	JVM Flags: 1 total; -Xss1M
	Launched Version: MOD_DEV
	Backend library: LWJGL version 3.2.1 build 12
	Backend API: NO CONTEXT
	GL Caps: 
	Using VBOs: Yes
	Is Modded: Definitely; Client brand changed to 'forge'
	Type: Client (map_client.txt)
	CPU: <unknown>
[23:17:21] [Render thread/INFO] [STDOUT/]: [net.minecraft.util.registry.Bootstrap:printToSYSOUT:130]: #@!@# Game crashed! Crash report saved to: #@!@# /Users/jakobfranceskin/Documents/Programming/Java/Minecraft Mods/MinecraftByExample-master/run/./crash-reports/crash-2021-03-30_23.17.21-client.txt

Process finished with exit code 255

 

Edited March 31, 2021 by jkPlayer998

[jkPlayer998]

I know that that, but when I downloaded the official forge example mod, and added a few blocks, the error was suppressed.

 

[jkPlayer998]

There were some errors and it said that intellij suppressed the errors and then the game opened. Now I just updated to the 1.16.5 MDK version and it works.

[dan101251]

hey there, I am making my first mod as well, and I'm having the same problem as you. Can I please get some help I have no clue what to do.

 

[14:24:22] [main/WARN] (mixin) @Mixin target net/minecraft/server/world/ThreadedAnvilChunkStorage$EntityTracker is public in fabric-networking-api-v1.mixins.json:accessor.EntityTrackerAccessor and should be specified in value

[14:24:22] [main/WARN] (mixin) @Mixin target net/minecraft/client/particle/ParticleManager$SimpleSpriteProvider is public in fabric-particles-v1.mixins.json:ParticleManagerAccessor$SimpleSpriteProviderAccessor and should be specified in value

[14:24:22] [main/WARN] (mixin) @Mixin target net/minecraft/data/server/AbstractTagProvider$ObjectBuilder is public in fabric-tag-extensions-v0.mixins.json:MixinObjectBuilder and should be specified in value

[14:24:22] [main/WARN] (mixin) @Mixin target net/minecraft/tag/RequiredTagList$TagWrapper is public in fabric-tag-extensions-v0.mixins.json:MixinTagImpl and should be specified in value

[14:24:23] [main/WARN] (FileUtil) Configuration conflict: there is more than one oshi.properties file on the classpath

[14:24:23] [main/WARN] (FileUtil) Configuration conflict: there is more than one oshi.architecture.properties file on the classpath

[14:24:30] [Render thread/INFO] (Minecraft) Environment: authHost='https://authserver.mojang.com', accountsHost='https://api.mojang.com', sessionHost='https://sessionserver.mojang.com', servicesHost='https://api.minecraftservices.com', name='PROD'

[14:24:31] [Render thread/ERROR] (Minecraft) Failed to verify authentication

In bold is the problem I'm not sure how to fix.