java.lang.RuntimeException: Failed to remap jar
at me.modmuss50.optifabric.mod.OptifineSetup.remapOptifine(OptifineSetup.java:215)
at me.modmuss50.optifabric.mod.OptifineSetup.remapOptifine(OptifineSetup.java:200)
at me.modmuss50.optifabric.mod.OptifineSetup.getRuntime(OptifineSetup.java:166)
at me.modmuss50.optifabric.mod.OptifabricSetup.run(OptifabricSetup.java:41)
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:667)
at org.spongepowered.asm.mixin.transformer.MixinProcessor.prepareConfigs(MixinProcessor.java:542)
at org.spongepowered.asm.mixin.transformer.MixinProcessor.select(MixinProcessor.java:439)
at org.spongepowered.asm.mixin.transformer.MixinProcessor.checkSelect(MixinProcessor.java:415)
at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:285)
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:208)
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:178)
at org.spongepowered.asm.mixin.transformer.FabricMixinTransformerProxy.transformClassBytes(FabricMixinTransformerProxy.java:23)
at net.fabricmc.loader.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:162)
at net.fabricmc.loader.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:154)
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.util.DefaultLanguageAdapter.create(DefaultLanguageAdapter.java:50)
at net.fabricmc.loader.EntrypointStorage$NewEntry.lambda$getOrCreate$0(EntrypointStorage.java:106)
at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1224)
at net.fabricmc.loader.EntrypointStorage$NewEntry.getOrCreate(EntrypointStorage.java:104)
at net.fabricmc.loader.EntrypointStorage.lambda$getEntrypointContainers$1(EntrypointStorage.java:191)
at net.fabricmc.loader.entrypoint.EntrypointContainerImpl.getEntrypoint(EntrypointContainerImpl.java:37)
at net.fabricmc.loader.entrypoint.minecraft.hooks.EntrypointUtils.invoke0(EntrypointUtils.java:47)
at net.fabricmc.loader.entrypoint.minecraft.hooks.EntrypointUtils.invoke(EntrypointUtils.java:33)
at net.fabricmc.loader.launch.knot.Knot.init(Knot.java:143)
at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:28)
Caused by: java.nio.file.FileSystemException: C:\Users\aless\curseforge\minecraft\Instances\Fabric.optifine\OptiFine_1.17.1_HD_U_G9\Optifine-mapped.jar: Impossibile accedere al file. Il file è utilizzato da un altro processo
at java.base/sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:92)
at java.base/sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:103)
at java.base/sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:108)
at java.base/sun.nio.fs.WindowsFileSystemProvider.implDelete(WindowsFileSystemProvider.java:275)
at java.base/sun.nio.fs.AbstractFileSystemProvider.delete(AbstractFileSystemProvider.java:105)
at java.base/java.nio.file.Files.delete(Files.java:1146)
at jdk.zipfs/jdk.nio.zipfs.ZipFileSystem.sync(ZipFileSystem.java:1839)
at jdk.zipfs/jdk.nio.zipfs.ZipFileSystem.lambda$close$9(ZipFileSystem.java:474)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:554)
at jdk.zipfs/jdk.nio.zipfs.ZipFileSystem.close(ZipFileSystem.java:473)
at net.fabricmc.tinyremapper.OutputConsumerPath.close(OutputConsumerPath.java:225)
at me.modmuss50.optifabric.mod.OptifineSetup.remapOptifine(OptifineSetup.java:214)
... 29 more

I'm getting a similar error:
java.lang.RuntimeException: Failed to remap jar at me.modmuss50.optifabric.mod.OptifineSetup.remapOptifine(OptifineSetup.java:215) at me.modmuss50.optifabric.mod.OptifineSetup.remapOptifine(OptifineSetup.java:200) at me.modmuss50.optifabric.mod.OptifineSetup.getRuntime(OptifineSetup.java:166) at me.modmuss50.optifabric.mod.OptifabricSetup.run(OptifabricSetup.java:41) 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:667) at org.spongepowered.asm.mixin.transformer.MixinProcessor.prepareConfigs(MixinProcessor.java:542) at org.spongepowered.asm.mixin.transformer.MixinProcessor.select(MixinProcessor.java:439) at org.spongepowered.asm.mixin.transformer.MixinProcessor.checkSelect(MixinProcessor.java:415) at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:285) at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:208) at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:178) at org.spongepowered.asm.mixin.transformer.FabricMixinTransformerProxy.transformClassBytes(FabricMixinTransformerProxy.java:23) at net.fabricmc.loader.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:162) at net.fabricmc.loader.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:154) 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.util.DefaultLanguageAdapter.create(DefaultLanguageAdapter.java:50) at net.fabricmc.loader.EntrypointStorage$NewEntry.lambda$getOrCreate$0(EntrypointStorage.java:106) at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1224) at net.fabricmc.loader.EntrypointStorage$NewEntry.getOrCreate(EntrypointStorage.java:104) at net.fabricmc.loader.EntrypointStorage.lambda$getEntrypointContainers$1(EntrypointStorage.java:191) at net.fabricmc.loader.entrypoint.EntrypointContainerImpl.getEntrypoint(EntrypointContainerImpl.java:37) at net.fabricmc.loader.entrypoint.minecraft.hooks.EntrypointUtils.invoke0(EntrypointUtils.java:47) at net.fabricmc.loader.entrypoint.minecraft.hooks.EntrypointUtils.invoke(EntrypointUtils.java:33) at net.fabricmc.loader.launch.knot.Knot.init(Knot.java:143) at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:28) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:567) at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:210) at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:245) at org.multimc.EntryPoint.listen(EntryPoint.java:143) at org.multimc.EntryPoint.main(EntryPoint.java:34) Caused by: java.lang.RuntimeException: Unfixable conflicts at net.fabricmc.tinyremapper.TinyRemapper.handleConflicts(TinyRemapper.java:773) at net.fabricmc.tinyremapper.TinyRemapper.propagate(TinyRemapper.java:673) at net.fabricmc.tinyremapper.TinyRemapper.mrjRefresh(TinyRemapper.java:948) at net.fabricmc.tinyremapper.TinyRemapper.apply(TinyRemapper.java:804) at net.fabricmc.tinyremapper.TinyRemapper.apply(TinyRemapper.java:778) at me.modmuss50.optifabric.mod.OptifineSetup.remapOptifine(OptifineSetup.java:213) ... 37 more

Mods loaded:

• Fabric API 0.40.1+1.17
• OptiFabric 1.11.20
• OptiFine preview_OptiFine_1.17.1_HD_U_H1_pre1.jar
• Replay Mod 1.17.1-2.6.1

I also have a very similar error:
java.io.UncheckedIOException: Error transforming /home/jreinhardt/.minecraft/.optifine/OptiFine_1.17.1_HD_U_G9/Optifine-mod.jar at me.modmuss50.optifabric.util.ZipUtils.transform(ZipUtils.java:108) at me.modmuss50.optifabric.mod.OptifineSetup.getRuntime(OptifineSetup.java:128) at me.modmuss50.optifabric.mod.OptifabricSetup.run(OptifabricSetup.java:41) 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:667) at org.spongepowered.asm.mixin.transformer.MixinProcessor.prepareConfigs(MixinProcessor.java:542) at org.spongepowered.asm.mixin.transformer.MixinProcessor.select(MixinProcessor.java:439) at org.spongepowered.asm.mixin.transformer.MixinProcessor.checkSelect(MixinProcessor.java:415) at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:285) at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:208) at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:178) at org.spongepowered.asm.mixin.transformer.FabricMixinTransformerProxy.transformClassBytes(FabricMixinTransformerProxy.java:23) at net.fabricmc.loader.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:162) at net.fabricmc.loader.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:154) 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.util.DefaultLanguageAdapter.create(DefaultLanguageAdapter.java:50) at net.fabricmc.loader.EntrypointStorage$NewEntry.lambda$getOrCreate$0(EntrypointStorage.java:106) at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1224) at net.fabricmc.loader.EntrypointStorage$NewEntry.getOrCreate(EntrypointStorage.java:104) at net.fabricmc.loader.EntrypointStorage.lambda$getEntrypointContainers$1(EntrypointStorage.java:191) at net.fabricmc.loader.entrypoint.EntrypointContainerImpl.getEntrypoint(EntrypointContainerImpl.java:37) at net.fabricmc.loader.entrypoint.minecraft.hooks.EntrypointUtils.invoke0(EntrypointUtils.java:47) at net.fabricmc.loader.entrypoint.minecraft.hooks.EntrypointUtils.invoke(EntrypointUtils.java:33) at net.fabricmc.loader.launch.knot.Knot.init(Knot.java:143) at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:28) Caused by: java.util.zip.ZipException: zip END header not found at java.base/java.util.zip.ZipFile$Source.zerror(ZipFile.java:1587) at java.base/java.util.zip.ZipFile$Source.findEND(ZipFile.java:1441) at java.base/java.util.zip.ZipFile$Source.initCEN(ZipFile.java:1450) at java.base/java.util.zip.ZipFile$Source.<init>(ZipFile.java:1263) at java.base/java.util.zip.ZipFile$Source.get(ZipFile.java:1225) at java.base/java.util.zip.ZipFile$CleanableResource.<init>(ZipFile.java:706) at java.base/java.util.zip.ZipFile.<init>(ZipFile.java:240) at java.base/java.util.zip.ZipFile.<init>(ZipFile.java:171) at me.modmuss50.optifabric.util.ZipUtils.transform(ZipUtils.java:135) at me.modmuss50.optifabric.util.ZipUtils.transform(ZipUtils.java:105) ... 28 more

Mods loaded:

• optifabric (optifabric-1.11.20.jar)
• optifine (OptiFine_1.17.1_HD_U_G9.jar)
• world edit (worldedit-mod-7.2.6.jar)
• pehkui (Pehkui-2.3.0+1.14.4-1.17.1.jar)
• carpet (fabric-carpet-1.17.1-1.4.45+v210811.jar)
• code ultilities (CodeUtilities-2.2.2.jar)
• replay mod (replaymod-1.17.1-2.6.1.jar)
• fabric api (fabric-api-0.40.0+1.17.jar)

these errors are similiar for me too