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Error while trying to play versions above 1.12.11 #5748

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Error while trying to play versions above 1.12.11#5748
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bug
@Daguywhodoessomething

Description

@Daguywhodoessomething
Daguywhodoessomething
opened on Apr 2, 2026

Operating System

No response

Description of bug

This is happening with versions above 1.12.11
Idk what the issue is and i'll look in the things to find it.

The log:
MultiMC version: 0.7.0-4259

Launched instance in online mode

sessionserver.mojang.com resolves to:
[2620:1ec:bdf::38, 2620:1ec:46::38, 13.107.246.38, 13.107.213.38]

textures.minecraft.net resolves to:
[2620:1ec:46::38, 2620:1ec:bdf::38, 13.107.213.38, 13.107.246.38]

api.minecraftservices.com resolves to:
[2620:1ec:46::38, 2620:1ec:bdf::38, 13.107.246.38, 13.107.213.38]

Minecraft folder is:
C:/Users/Wyatt/Documents/MultiMC/MultiMC/instances/26.1.1/.minecraft

Java path is:
C:/Program Files/Microsoft/jdk-21.0.9.10-hotspot/bin/javaw.exe

Checking Java version...
Java is version 21.0.9, using amd64 architecture, from Microsoft.

Main Class:
net.minecraft.client.main.Main

Native path:
C:/Users/Wyatt/Documents/MultiMC/MultiMC/instances/26.1.1/natives

Traits:
traits FirstThreadOnMacOS
traits XR:Initial

Libraries:
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/at/yawk/lz4/lz4-java/1.10.1/lz4-java-1.10.1.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/com/azure/azure-json/1.4.0/azure-json-1.4.0.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/com/github/oshi/oshi-core/6.9.0/oshi-core-6.9.0.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/com/google/code/gson/gson/2.13.2/gson-2.13.2.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/com/google/guava/failureaccess/1.0.3/failureaccess-1.0.3.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/com/google/guava/guava/33.5.0-jre/guava-33.5.0-jre.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/com/ibm/icu/icu4j/77.1/icu4j-77.1.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/com/microsoft/azure/msal4j/1.23.1/msal4j-1.23.1.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/com/mojang/authlib/7.0.63/authlib-7.0.63.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/com/mojang/blocklist/1.0.10/blocklist-1.0.10.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/com/mojang/brigadier/1.3.10/brigadier-1.3.10.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/com/mojang/datafixerupper/9.0.19/datafixerupper-9.0.19.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/com/mojang/jtracy/1.0.37/jtracy-1.0.37.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/com/mojang/jtracy/1.0.37/jtracy-1.0.37-natives-windows.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/com/mojang/logging/1.6.11/logging-1.6.11.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/com/mojang/patchy/2.2.10/patchy-2.2.10.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/com/mojang/text2speech/1.18.11/text2speech-1.18.11.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/commons-codec/commons-codec/1.19.0/commons-codec-1.19.0.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/commons-io/commons-io/2.20.0/commons-io-2.20.0.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/io/netty/netty-buffer/4.2.7.Final/netty-buffer-4.2.7.Final.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/io/netty/netty-codec-base/4.2.7.Final/netty-codec-base-4.2.7.Final.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/io/netty/netty-codec-compression/4.2.7.Final/netty-codec-compression-4.2.7.Final.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/io/netty/netty-codec-http/4.2.7.Final/netty-codec-http-4.2.7.Final.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/io/netty/netty-common/4.2.7.Final/netty-common-4.2.7.Final.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/io/netty/netty-handler/4.2.7.Final/netty-handler-4.2.7.Final.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/io/netty/netty-resolver/4.2.7.Final/netty-resolver-4.2.7.Final.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/io/netty/netty-transport-classes-epoll/4.2.7.Final/netty-transport-classes-epoll-4.2.7.Final.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/io/netty/netty-transport-classes-kqueue/4.2.7.Final/netty-transport-classes-kqueue-4.2.7.Final.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/io/netty/netty-transport-native-unix-common/4.2.7.Final/netty-transport-native-unix-common-4.2.7.Final.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/io/netty/netty-transport/4.2.7.Final/netty-transport-4.2.7.Final.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/it/unimi/dsi/fastutil/8.5.18/fastutil-8.5.18.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/net/java/dev/jna/jna-platform/5.17.0/jna-platform-5.17.0.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/net/java/dev/jna/jna/5.17.0/jna-5.17.0.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/net/sf/jopt-simple/jopt-simple/5.0.4/jopt-simple-5.0.4.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/apache/commons/commons-compress/1.28.0/commons-compress-1.28.0.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/apache/commons/commons-lang3/3.19.0/commons-lang3-3.19.0.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/apache/logging/log4j/log4j-api/2.25.2/log4j-api-2.25.2.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/apache/logging/log4j/log4j-core/2.25.2/log4j-core-2.25.2.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/apache/logging/log4j/log4j-slf4j2-impl/2.25.2/log4j-slf4j2-impl-2.25.2.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/jcraft/jorbis/0.0.17/jorbis-0.0.17.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/joml/joml/1.10.8/joml-1.10.8.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/jspecify/jspecify/1.0.0/jspecify-1.0.0.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-freetype/3.4.1/lwjgl-freetype-3.4.1.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-freetype/3.4.1/lwjgl-freetype-3.4.1-natives-windows.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-freetype/3.4.1/lwjgl-freetype-3.4.1-natives-windows-arm64.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-freetype/3.4.1/lwjgl-freetype-3.4.1-natives-windows-x86.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-glfw/3.4.1/lwjgl-glfw-3.4.1.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-glfw/3.4.1/lwjgl-glfw-3.4.1-natives-windows.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-glfw/3.4.1/lwjgl-glfw-3.4.1-natives-windows-arm64.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-glfw/3.4.1/lwjgl-glfw-3.4.1-natives-windows-x86.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-jemalloc/3.4.1/lwjgl-jemalloc-3.4.1.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-jemalloc/3.4.1/lwjgl-jemalloc-3.4.1-natives-windows.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-jemalloc/3.4.1/lwjgl-jemalloc-3.4.1-natives-windows-arm64.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-jemalloc/3.4.1/lwjgl-jemalloc-3.4.1-natives-windows-x86.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-openal/3.4.1/lwjgl-openal-3.4.1.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-openal/3.4.1/lwjgl-openal-3.4.1-natives-windows.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-openal/3.4.1/lwjgl-openal-3.4.1-natives-windows-arm64.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-openal/3.4.1/lwjgl-openal-3.4.1-natives-windows-x86.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-opengl/3.4.1/lwjgl-opengl-3.4.1.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-opengl/3.4.1/lwjgl-opengl-3.4.1-natives-windows.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-opengl/3.4.1/lwjgl-opengl-3.4.1-natives-windows-arm64.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-opengl/3.4.1/lwjgl-opengl-3.4.1-natives-windows-x86.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-stb/3.4.1/lwjgl-stb-3.4.1.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-stb/3.4.1/lwjgl-stb-3.4.1-natives-windows.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-stb/3.4.1/lwjgl-stb-3.4.1-natives-windows-arm64.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-stb/3.4.1/lwjgl-stb-3.4.1-natives-windows-x86.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-tinyfd/3.4.1/lwjgl-tinyfd-3.4.1.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-tinyfd/3.4.1/lwjgl-tinyfd-3.4.1-natives-windows.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-tinyfd/3.4.1/lwjgl-tinyfd-3.4.1-natives-windows-arm64.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl-tinyfd/3.4.1/lwjgl-tinyfd-3.4.1-natives-windows-x86.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl/3.4.1/lwjgl-3.4.1.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl/3.4.1/lwjgl-3.4.1-natives-windows.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl/3.4.1/lwjgl-3.4.1-natives-windows-arm64.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/lwjgl/lwjgl/3.4.1/lwjgl-3.4.1-natives-windows-x86.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/org/slf4j/slf4j-api/2.0.17/slf4j-api-2.0.17.jar
C:/Users/Wyatt/Documents/MultiMC/MultiMC/libraries/com/mojang/minecraft/26.1.1/minecraft-26.1.1-client.jar

Native libraries:

Params:
--username Verner_Elfwin --version 26.1.1 --gameDir C:/Users/Wyatt/Documents/MultiMC/MultiMC/instances/26.1.1/.minecraft --assetsDir C:/Users/Wyatt/Documents/MultiMC/MultiMC/assets --assetIndex 30 --uuid --accessToken --versionType release

Window size: 854 x 480

Java Arguments:
[-XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump, -Xms8096m, -Xmx8096m, -Duser.language=en]

Minecraft process ID: 16528

Using onesix launcher.

Exception in thread "main" java.lang.UnsupportedClassVersionError: net/minecraft/client/main/Main has been compiled by a more recent version of the Java Runtime (class file version 69.0), this version of the Java Runtime only recognizes class file versions up to 65.0
at java.base/java.lang.ClassLoader.defineClass1(Native Method)
at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1027)
at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:150)
at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:862)
at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:760)
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:681)
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:639)
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526)
at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:217)
at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:278)
at org.multimc.EntryPoint.listen(EntryPoint.java:143)
at org.multimc.EntryPoint.main(EntryPoint.java:34)

Can anyone help me with this?

Steps to reproduce

Play any version above 1.12.11

Suspected cause

idk what it could be

This issue is unique

  • I have searched the issue tracker and did not find an issue describing my bug.

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