Minecarft: 1.16.5 Fabric
Stack-trace:
java.lang.NoClassDefFoundError: net/fabricmc/tinyremapper/IMappingProvider
at me.modmuss50.optifabric.mod.OptifabricSetup.run(OptifabricSetup.java:46)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
at com.chocohead.mm.Plugin.getMixins(Plugin.java:340)
at org.spongepowered.asm.mixin.transformer.PluginHandle.getMixins(PluginHandle.java:128)
at org.spongepowered.asm.mixin.transformer.MixinConfig.postInitialise(MixinConfig.java:796)
at org.spongepowered.asm.mixin.transformer.MixinProcessor.prepareConfigs(MixinProcessor.java:568)
at org.spongepowered.asm.mixin.transformer.MixinProcessor.select(MixinProcessor.java:462)
at org.spongepowered.asm.mixin.transformer.MixinProcessor.checkSelect(MixinProcessor.java:438)
at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:290)
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:234)
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:202)
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:422)
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.tryLoadClass(KnotClassDelegate.java:323)
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.loadClass(KnotClassDelegate.java:218)
at net.fabricmc.loader.impl.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:119)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:519)
at java.base/java.lang.Class.forName0(Native Method)
at java.base/java.lang.Class.forName(Class.java:466)
at net.fabricmc.loader.impl.util.DefaultLanguageAdapter.create(DefaultLanguageAdapter.java:50)
at net.fabricmc.loader.impl.entrypoint.EntrypointStorage$NewEntry.getOrCreate(EntrypointStorage.java:117)
at net.fabricmc.loader.impl.entrypoint.EntrypointContainerImpl.getEntrypoint(EntrypointContainerImpl.java:53)
at net.fabricmc.loader.impl.FabricLoaderImpl.invokeEntrypoints(FabricLoaderImpl.java:384)
at net.fabricmc.loader.impl.launch.knot.Knot.init(Knot.java:160)
at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:68)
at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)
Caused by: java.lang.ClassNotFoundException: net.fabricmc.tinyremapper.IMappingProvider
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:636)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:519)
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.loadClass(KnotClassDelegate.java:226)
at net.fabricmc.loader.impl.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:119)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:519)
... 25 more
Help please

Try using Fabric Loader 0.14.25.

At this point it would be helpful to see what is going on when it is trying to launch MC.
%AppData%\Roaming.minecraft\crash-reports (the 1 with the most recent date)
%AppData%\Roaming.minecraft\logs (latest.log)

At this point it would be helpful to see what is going on when it is trying to launch MC. %AppData%\Roaming.minecraft\crash-reports (the 1 with the most recent date) %AppData%\Roaming.minecraft\logs (latest.log)

I didnt find it
I think its because i didnt use official launcher(i use Legacy Launcher)
But i find this
launcher.log
launcher.log.10.txt < i think its the same file like upper

latest.log < Minecraft folder log

I think this is my mistake, sorry for wasting your time. 😔

i see in the latest.log he starting with Fabric Loader 0.15.6 but i didnt have it:

Try using Fabric Loader 0.14.25.
Tried it doesn't work
And should I uninstall the new version? If so, how?

Which mods are you using and what are their versions?

Which mods are you using and what are their versions?
i need to send All?

Ok fine. Fabric Loader version, Fabric API version, Optifabric version, Optifine version?

Ok fine. Fabric Loader version, Fabric API version, Optifabric version, Optifine version?

Fabric Loader version: 0.14.25
Fabric API version: fabric-api-0.42.0+1.16
Optifabric version: optifabric-1.13.16
Optifine version: OptiFine_1.16.5_HD_U_G8

Ok fine. Fabric Loader version, Fabric API version, Optifabric version, Optifine version?

Tried without mods nothing changed:

Mods:

Did you try running it with only the 3 mods (Fabric API, Optifabric, Optifine) using the 14.25 Fabric Launcher profile?

I already tried this in my comment

Did you try running it with only the 3 mods (Fabric API, Optifabric, Optifine) using the 14.25 Fabric Launcher profile?

Just making sure we have all bases covered. Have you tried running the vanilla launcher for 1.16.5 once to ensure the version was downloaded by the launcher and the game started?

Just making sure we have all bases covered. Have you tried running the vanilla launcher for 1.16.5 once to ensure the version was downloaded by the launcher and the game started?

Yes its running perfectly

Is that the log file in the first post or is that just the stack trace of the error?

Stack trace

Is that the log file in the first post or is that just the stack trace of the error?

You want a log file?
Idk where it is :(

Is that the log file in the first post or is that just the stack trace of the error?

I think i cant use optifine on unofficial launcher

Its ok. That is one of the reasons we ask for logs. I hope you get it figured out and working.