Catman211

I fixed it! I had to change the forge version to the most recent one in profile options!

Oh, something else to note, whenever I launch MC I have to close the MC Launcher in task manager otherwise the game won't fully load. May be relevant to this issue, I don't know.

I am trying to play 1.16.5 modpacks (Enigmatica 6) and this keeps happening. Please help. Preparing to launch minecraft client for forge-36.1.31 17:12:27.397 Couldn't fetch SHA1 checksum for https://s3.amazonaws.com/Minecraft.Download/versions/1.16.5/1.16.5.jar 17:12:27.398 Have local file C:\Users\Christopher\Twitch\Minecraft\Install\versions\1.16.5\1.16.5.jar but don't know what size or hash it should be. Have to assume it's good. 17:12:27.399 Checking installations. 17:12:27.400 Minecraft client forge-36.1.31 is ready to start. 17:12:27.400 Starting! 17:12:27.637 Using default game log configuration client-1.12.xml (outputs XML) 17:12:28.304 ModLauncher running: args [--username, Catman211, --version, forge-36.1.31, --gameDir, C:\Users\Christopher\Twitch\Minecraft\Instances\Enigmatica 6 - E6 - 1.16.5, --assetsDir, C:\Users\Christopher\Twitch\Minecraft\Install\assets, --assetIndex, 1.16, --uuid, 38c816eb1d2940b59d2e79276860c9dc, --accessToken, ❄❄❄❄❄❄❄❄, --userType, mojang, --versionType, release, --width, 1024, --height, 768, --launchTarget, fmlclient, --fml.forgeVersion, 36.1.31, --fml.mcVersion, 1.16.5, --fml.forgeGroup, net.minecraftforge, --fml.mcpVersion, 20210115.111550] 17:12:28.308 ModLauncher 8.0.9+86+master.3cf110c starting: java version 1.8.0_51 by Oracle Corporation 17:12:28.364 LEGACY JDK DETECTED, SECURED JAR HANDLING DISABLED 17:12:28.945 Added Lets Encrypt root certificates as additional trust 17:12:28.989 SpongePowered MIXIN Subsystem Version=0.8.2 Source=file:/C:/Users/Christopher/Twitch/Minecraft/Install/libraries/org/spongepowered/mixin/0.8.2/mixin-0.8.2.jar Service=ModLauncher Env=CLIENT 17:12:30.836 [java.lang.ThreadGroup:uncaughtException:1052]: java.lang.NoClassDefFoundError: net/minecraftforge/fml/javafmlmod/FMLJavaModLanguageProvider 17:12:30.862 [java.lang.ThreadGroup:uncaughtException:1052]: at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) 17:12:30.862 [java.lang.ThreadGroup:uncaughtException:1052]: at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) 17:12:30.862 [java.lang.ThreadGroup:uncaughtException:1052]: at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) 17:12:30.862 [java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.TransformationServicesHandler.runScanningTransformationServices(TransformationServicesHandler.java:116) 17:12:30.862 [java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.TransformationServicesHandler.initializeTransformationServices(TransformationServicesHandler.java:63) 17:12:30.862 [java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.Launcher.run(Launcher.java:76) 17:12:30.862 [java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) 17:12:30.863 [java.lang.ThreadGroup:uncaughtException:1061]: Caused by: java.lang.ClassNotFoundException: net.minecraftforge.fml.javafmlmod.FMLJavaModLanguageProvider 17:12:30.863 [java.lang.ThreadGroup:uncaughtException:1061]: at java.net.URLClassLoader.findClass(URLClassLoader.java:381) 17:12:30.863 [java.lang.ThreadGroup:uncaughtException:1061]: at java.lang.ClassLoader.loadClass(ClassLoader.java:424) 17:12:30.863 [java.lang.ThreadGroup:uncaughtException:1061]: at java.lang.ClassLoader.loadClass(ClassLoader.java:357) 17:12:30.863 [java.lang.ThreadGroup:uncaughtException:1061]: ... 43 more 17:12:31.484 Java HotSpot(TM) 64-Bit Server VM warning: ignoring option PermSize=256m; support was removed in 8.0 Then itll crash with error code 1