I went through many Forums and wanted to fix it myself. with no real solution. I would guess its becouse of the Java.Lang.NullPointerExceptionist. but i cant find an answer online that i understand.
This is the Consol Report.:"
[06:14:22] [main/INFO] [GradleStart]: Extra: []
[06:14:22] [main/INFO] [GradleStart]: Running with arguments: [--userProperties, {}, --assetsDir, C:/Users/lazer/.gradle/caches/minecraft/assets, --assetIndex, 1.12, --accessToken{REDACTED}, --version, 1.12.2, --tweakClass, net.minecraftforge.fml.common.launcher.FMLTweaker, --tweakClass, net.minecraftforge.gradle.tweakers.CoremodTweaker]
[06:14:22] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[06:14:22] [main/INFO] [LaunchWrapper]: Using primary tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[06:14:22] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.gradle.tweakers.CoremodTweaker
[06:14:22] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLTweaker
[06:14:22] [main/INFO] [FML]: Forge Mod Loader version 14.23.5.2768 for Minecraft 1.12.2 loading
[06:14:22] [main/INFO] [FML]: Java is OpenJDK 64-Bit Server VM, version 1.8.0_242, running on Windows 10:amd64:10.0, installed at C:\Program Files\AdoptOpenJDK\jdk-8.0.242.08-hotspot\jre
[06:14:22] [main/ERROR] [FML]: Apache Maven library folder was not in the format expected. Using default libraries directory.
[06:14:22] [main/ERROR] [FML]: Full: C:\Users\lazer\.gradle\caches\modules-2\files-2.1\org.apache.maven\maven-artifact\3.5.3\7dc72b6d6d8a6dced3d294ed54c2cc3515ade9f4\maven-artifact-3.5.3.jar
[06:14:22] [main/ERROR] [FML]: Trimmed: c:/users/lazer/.gradle/caches/modules-2/files-2.1/org.apache.maven/maven-artifact/3.5.3/
[06:14:23] [main/INFO] [FML]: Managed to load a deobfuscated Minecraft name- we are in a deobfuscated environment. Skipping runtime deobfuscation
[06:14:23] [main/INFO] [FML]: Detected deobfuscated environment, loading log configs for colored console logs.
2020-04-02 06:14:24,633 main WARN Disabling terminal, you're running in an unsupported environment.
[06:14:24] [main/INFO] [FML]: Ignoring missing certificate for coremod FMLCorePlugin (net.minecraftforge.fml.relauncher.FMLCorePlugin), we are in deobf and it's a forge core plugin
[06:14:24] [main/INFO] [FML]: Ignoring missing certificate for coremod FMLForgePlugin (net.minecraftforge.classloading.FMLForgePlugin), we are in deobf and it's a forge core plugin
[06:14:24] [main/INFO] [FML]: Searching C:\Users\lazer\Desktop\Mein Modding\Athalkon Mod\AthalkonMod\run\.\mods for mods
[06:14:24] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.gradle.tweakers.CoremodTweaker
[06:14:24] [main/INFO] [GradleStart]: Injecting location in coremod net.minecraftforge.fml.relauncher.FMLCorePlugin
[06:14:24] [main/INFO] [GradleStart]: Injecting location in coremod net.minecraftforge.classloading.FMLForgePlugin
[06:14:24] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[06:14:24] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
[06:14:24] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.gradle.tweakers.AccessTransformerTweaker
[06:14:24] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[06:14:24] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[06:14:24] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[06:14:29] [main/ERROR] [FML]: FML appears to be missing any signature data. This is not a good thing
[06:14:29] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[06:14:29] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
[06:14:30] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.gradle.tweakers.AccessTransformerTweaker
[06:14:30] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.TerminalTweaker
[06:14:30] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.TerminalTweaker
[06:14:30] [main/INFO] [LaunchWrapper]: Launching wrapped minecraft {net.minecraft.client.main.Main}
[06:14:31] [main/ERROR] [LaunchWrapper]: Unable to launch
java.lang.reflect.InvocationTargetException: null
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_242]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_242]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_242]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_242]
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_242]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_242]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_242]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_242]
at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97) [start/:?]
at GradleStart.main(GradleStart.java:25) [start/:?]
Caused by: java.lang.ExceptionInInitializerError
at net.minecraft.client.Minecraft.getSystemTime(Minecraft.java:3158) ~[Minecraft.class:?]
at net.minecraft.client.main.Main.main(Main.java:42) ~[Main.class:?]
... 12 more
Caused by: java.lang.NullPointerException
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1847) ~[?:1.8.0_242]
at java.lang.Runtime.loadLibrary0(Runtime.java:871) ~[?:1.8.0_242]
at java.lang.System.loadLibrary(System.java:1124) ~[?:1.8.0_242]
at org.lwjgl.Sys$1.run(Sys.java:72) ~[lwjgl-2.9.4-nightly-20150209.jar:?]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_242]
at org.lwjgl.Sys.doLoadLibrary(Sys.java:66) ~[lwjgl-2.9.4-nightly-20150209.jar:?]
at org.lwjgl.Sys.loadLibrary(Sys.java:87) ~[lwjgl-2.9.4-nightly-20150209.jar:?]
at org.lwjgl.Sys.<clinit>(Sys.java:117) ~[lwjgl-2.9.4-nightly-20150209.jar:?]
at net.minecraft.client.Minecraft.getSystemTime(Minecraft.java:3158) ~[Minecraft.class:?]
at net.minecraft.client.main.Main.main(Main.java:42) ~[Main.class:?]
... 12 more
Exception in thread "main" [06:14:31] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: java.lang.reflect.InvocationTargetException
[06:14:31] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[06:14:31] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[06:14:31] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[06:14:31] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at java.lang.reflect.Method.invoke(Method.java:498)
[06:14:31] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:97)
[06:14:31] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: at GradleStart.main(GradleStart.java:25)
[06:14:31] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]: Caused by: net.minecraftforge.fml.relauncher.FMLSecurityManager$ExitTrappedException
[06:14:31] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]: at net.minecraftforge.fml.relauncher.FMLSecurityManager.checkPermission(FMLSecurityManager.java:49)
[06:14:31] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]: at java.lang.SecurityManager.checkExit(SecurityManager.java:761)
[06:14:31] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]: at java.lang.Runtime.exit(Runtime.java:108)
[06:14:31] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]: at java.lang.System.exit(System.java:973)
[06:14:31] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]: at net.minecraft.launchwrapper.Launch.launch(Launch.java:138)
[06:14:31] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]: at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
[06:14:31] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1061]: ... 6 more
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Thank you Whoever reads this. ^^