I tested both launchers you mentioned above. Both MultiMC and ATLauncher both immediately crash on startup. I attached the game log before it crashed however MultiMC version: 0.7.0-4248 Launched instance in online mode sessionserver.mojang.com resolves to: [2620:1ec:46::40, 2620:1ec:bdf::40, 13.107.246.40, 13.107.213.40] textures.minecraft.net resolves to: [2620:1ec:46::40, 2620:1ec:bdf::40, 13.107.246.40, 13.107.213.40] api.minecraftservices.com resolves to: [2620:1ec:46::40, 2620:1ec:bdf::40, 13.107.246.40, 13.107.213.40] Minecraft folder is: C:/Users/hcgar/Documents/MultiMC/instances/1.21.11/.minecraft Java path is: C:/Program Files/Common Files/Oracle/Java/javapath/javaw.exe Checking Java version... Java is version 21.0.10, using amd64 architecture, from Oracle Corporation. Main Class: net.minecraft.client.main.Main Native path: C:/Users/hcgar/Documents/MultiMC/instances/1.21.11/natives Traits: traits XR:Initial traits FirstThreadOnMacOS Libraries: C:/Users/hcgar/Documents/MultiMC/libraries/at/yawk/lz4/lz4-java/1.8.1/lz4-java-1.8.1.jar C:/Users/hcgar/Documents/MultiMC/libraries/com/azure/azure-json/1.4.0/azure-json-1.4.0.jar C:/Users/hcgar/Documents/MultiMC/libraries/com/github/oshi/oshi-core/6.9.0/oshi-core-6.9.0.jar C:/Users/hcgar/Documents/MultiMC/libraries/com/google/code/gson/gson/2.13.2/gson-2.13.2.jar C:/Users/hcgar/Documents/MultiMC/libraries/com/google/guava/failureaccess/1.0.3/failureaccess-1.0.3.jar C:/Users/hcgar/Documents/MultiMC/libraries/com/google/guava/guava/33.5.0-jre/guava-33.5.0-jre.jar C:/Users/hcgar/Documents/MultiMC/libraries/com/ibm/icu/icu4j/77.1/icu4j-77.1.jar C:/Users/hcgar/Documents/MultiMC/libraries/com/microsoft/azure/msal4j/1.23.1/msal4j-1.23.1.jar C:/Users/hcgar/Documents/MultiMC/libraries/com/mojang/authlib/7.0.61/authlib-7.0.61.jar C:/Users/hcgar/Documents/MultiMC/libraries/com/mojang/blocklist/1.0.10/blocklist-1.0.10.jar C:/Users/hcgar/Documents/MultiMC/libraries/com/mojang/brigadier/1.3.10/brigadier-1.3.10.jar C:/Users/hcgar/Documents/MultiMC/libraries/com/mojang/datafixerupper/9.0.19/datafixerupper-9.0.19.jar C:/Users/hcgar/Documents/MultiMC/libraries/com/mojang/jtracy/1.0.37/jtracy-1.0.37.jar C:/Users/hcgar/Documents/MultiMC/libraries/com/mojang/jtracy/1.0.37/jtracy-1.0.37-natives-windows.jar C:/Users/hcgar/Documents/MultiMC/libraries/com/mojang/logging/1.6.11/logging-1.6.11.jar C:/Users/hcgar/Documents/MultiMC/libraries/com/mojang/patchy/2.2.10/patchy-2.2.10.jar C:/Users/hcgar/Documents/MultiMC/libraries/com/mojang/text2speech/1.18.11/text2speech-1.18.11.jar C:/Users/hcgar/Documents/MultiMC/libraries/commons-codec/commons-codec/1.19.0/commons-codec-1.19.0.jar C:/Users/hcgar/Documents/MultiMC/libraries/commons-io/commons-io/2.20.0/commons-io-2.20.0.jar C:/Users/hcgar/Documents/MultiMC/libraries/io/netty/netty-buffer/4.2.7.Final/netty-buffer-4.2.7.Final.jar C:/Users/hcgar/Documents/MultiMC/libraries/io/netty/netty-codec-base/4.2.7.Final/netty-codec-base-4.2.7.Final.jar C:/Users/hcgar/Documents/MultiMC/libraries/io/netty/netty-codec-compression/4.2.7.Final/netty-codec-compression-4.2.7.Final.jar C:/Users/hcgar/Documents/MultiMC/libraries/io/netty/netty-codec-http/4.2.7.Final/netty-codec-http-4.2.7.Final.jar C:/Users/hcgar/Documents/MultiMC/libraries/io/netty/netty-common/4.2.7.Final/netty-common-4.2.7.Final.jar C:/Users/hcgar/Documents/MultiMC/libraries/io/netty/netty-handler/4.2.7.Final/netty-handler-4.2.7.Final.jar C:/Users/hcgar/Documents/MultiMC/libraries/io/netty/netty-resolver/4.2.7.Final/netty-resolver-4.2.7.Final.jar C:/Users/hcgar/Documents/MultiMC/libraries/io/netty/netty-transport-classes-epoll/4.2.7.Final/netty-transport-classes-epoll-4.2.7.Final.jar C:/Users/hcgar/Documents/MultiMC/libraries/io/netty/netty-transport-classes-kqueue/4.2.7.Final/netty-transport-classes-kqueue-4.2.7.Final.jar C:/Users/hcgar/Documents/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/hcgar/Documents/MultiMC/libraries/io/netty/netty-transport/4.2.7.Final/netty-transport-4.2.7.Final.jar C:/Users/hcgar/Documents/MultiMC/libraries/it/unimi/dsi/fastutil/8.5.18/fastutil-8.5.18.jar C:/Users/hcgar/Documents/MultiMC/libraries/net/java/dev/jna/jna-platform/5.17.0/jna-platform-5.17.0.jar C:/Users/hcgar/Documents/MultiMC/libraries/net/java/dev/jna/jna/5.17.0/jna-5.17.0.jar C:/Users/hcgar/Documents/MultiMC/libraries/net/sf/jopt-simple/jopt-simple/5.0.4/jopt-simple-5.0.4.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/apache/commons/commons-compress/1.28.0/commons-compress-1.28.0.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/apache/commons/commons-lang3/3.19.0/commons-lang3-3.19.0.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/apache/logging/log4j/log4j-api/2.25.2/log4j-api-2.25.2.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/apache/logging/log4j/log4j-core/2.25.2/log4j-core-2.25.2.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/apache/logging/log4j/log4j-slf4j2-impl/2.25.2/log4j-slf4j2-impl-2.25.2.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/jcraft/jorbis/0.0.17/jorbis-0.0.17.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/joml/joml/1.10.8/joml-1.10.8.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/jspecify/jspecify/1.0.0/jspecify-1.0.0.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-freetype/3.3.3/lwjgl-freetype-3.3.3.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-freetype/3.3.3/lwjgl-freetype-3.3.3-natives-windows.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-freetype/3.3.3/lwjgl-freetype-3.3.3-natives-windows-arm64.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-freetype/3.3.3/lwjgl-freetype-3.3.3-natives-windows-x86.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-glfw/3.3.3/lwjgl-glfw-3.3.3.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-glfw/3.3.3/lwjgl-glfw-3.3.3-natives-windows.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-glfw/3.3.3/lwjgl-glfw-3.3.3-natives-windows-arm64.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-glfw/3.3.3/lwjgl-glfw-3.3.3-natives-windows-x86.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-jemalloc/3.3.3/lwjgl-jemalloc-3.3.3.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-jemalloc/3.3.3/lwjgl-jemalloc-3.3.3-natives-windows.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-jemalloc/3.3.3/lwjgl-jemalloc-3.3.3-natives-windows-arm64.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-jemalloc/3.3.3/lwjgl-jemalloc-3.3.3-natives-windows-x86.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-openal/3.3.3/lwjgl-openal-3.3.3.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-openal/3.3.3/lwjgl-openal-3.3.3-natives-windows.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-openal/3.3.3/lwjgl-openal-3.3.3-natives-windows-arm64.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-openal/3.3.3/lwjgl-openal-3.3.3-natives-windows-x86.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-opengl/3.3.3/lwjgl-opengl-3.3.3.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-opengl/3.3.3/lwjgl-opengl-3.3.3-natives-windows.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-opengl/3.3.3/lwjgl-opengl-3.3.3-natives-windows-arm64.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-opengl/3.3.3/lwjgl-opengl-3.3.3-natives-windows-x86.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-stb/3.3.3/lwjgl-stb-3.3.3.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-stb/3.3.3/lwjgl-stb-3.3.3-natives-windows.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-stb/3.3.3/lwjgl-stb-3.3.3-natives-windows-arm64.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-stb/3.3.3/lwjgl-stb-3.3.3-natives-windows-x86.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-tinyfd/3.3.3/lwjgl-tinyfd-3.3.3.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-tinyfd/3.3.3/lwjgl-tinyfd-3.3.3-natives-windows.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-tinyfd/3.3.3/lwjgl-tinyfd-3.3.3-natives-windows-arm64.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl-tinyfd/3.3.3/lwjgl-tinyfd-3.3.3-natives-windows-x86.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl/3.3.3/lwjgl-3.3.3.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl/3.3.3/lwjgl-3.3.3-natives-windows.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl/3.3.3/lwjgl-3.3.3-natives-windows-arm64.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/lwjgl/lwjgl/3.3.3/lwjgl-3.3.3-natives-windows-x86.jar C:/Users/hcgar/Documents/MultiMC/libraries/org/slf4j/slf4j-api/2.0.17/slf4j-api-2.0.17.jar C:/Users/hcgar/Documents/MultiMC/libraries/com/mojang/minecraft/1.21.11/minecraft-1.21.11-client.jar Native libraries: Params: --username Hudson_458 --version 1.21.11 --gameDir C:/Users/hcgar/Documents/MultiMC/instances/1.21.11/.minecraft --assetsDir C:/Users/hcgar/Documents/MultiMC/assets --assetIndex 29 --uuid <PROFILE ID> --accessToken <ACCESS TOKEN> --versionType release Window size: 854 x 480 Java Arguments: [-XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump, -Xms512m, -Xmx1024m, -Duser.language=en] Minecraft process ID: 5792 Using onesix launcher. [19:57:17] [Datafixer Bootstrap/INFO]: 287 Datafixer optimizations took 458 milliseconds [19:57:21] [Render thread/INFO]: Environment: Environment[sessionHost=https://sessionserver.mojang.com, servicesHost=https://api.minecraftservices.com, profilesHost=https://api.mojang.com, name=PROD] [19:57:21] [Render thread/INFO]: Setting user: Hudson_458 [19:57:21] [Render thread/INFO]: Backend library: LWJGL version 3.3.3+5 [19:57:22] [Render thread/INFO]: Using optional rendering extensions: GL_ARB_buffer_storage, GL_KHR_debug, GL_ARB_vertex_attrib_binding, GL_ARB_direct_state_access, GL_EXT_texture_filter_anisotropic [19:57:22] [Render thread/INFO]: Reloading ResourceManager: vanilla [19:57:22] [Worker-Main-3/INFO]: Found unifont_pua-17.0.01.hex, loading [19:57:22] [Worker-Main-2/INFO]: Found unifont_all_no_pua-17.0.01.hex, loading [19:57:22] [Worker-Main-12/INFO]: Found unifont_jp_patch-17.0.01.hex, loading Process crashed with exit code -1073740791 (0xffffffffc0000409). Below is an analysis of the exit code. THIS MAY BE INCORRECT AND SHOULD BE TAKEN WITH A GRAIN OF SALT! System exit code name: STATUS_STACK_BUFFER_OVERRUN System exit code description: The system detected an overrun of a stack-based buffer in this application. This overrun could potentially allow a malicious user to gain control of this application. Please note that usually neither the exit code, nor its description are enough to diagnose issues! Always upload the entire log and not just the exit code. Clipboard copy at: 15 Mar 2026 19:57:51 -0400
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hudson_458 · 42 minutes ago 42 min
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