Launching Minecraft 1.18.1 on the latest version of Fabric (0.12.12) with OptiFine (HD U H4) and OptiFabric (v21.22.6), leads to an error message that reads:

There was an error loading OptiFabric!
Failed to load OptiFine, please report this!
Failed to remap jar

The stack-trace from that has been copied below, as well as posted to Pastebin here: pastebin.com/VnWzT5QY. There was one other mod installed at the time as well but removing it made no difference.

java.lang.RuntimeException: Failed to remap jar at me.modmuss50.optifabric.mod.OptifineSetup.remapOptifine(OptifineSetup.java:226) at me.modmuss50.optifabric.mod.OptifineSetup.remapOptifine(OptifineSetup.java:211) at me.modmuss50.optifabric.mod.OptifineSetup.getRuntime(OptifineSetup.java:165) at me.modmuss50.optifabric.mod.OptifabricSetup.run(OptifabricSetup.java:43) 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:247) at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.tryLoadClass(KnotClassDelegate.java:150) at net.fabricmc.loader.impl.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:155) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520) at java.base/java.lang.Class.forName0(Native Method) at java.base/java.lang.Class.forName(Class.java:467) at net.fabricmc.loader.impl.util.DefaultLanguageAdapter.create(DefaultLanguageAdapter.java:50) at net.fabricmc.loader.impl.entrypoint.EntrypointStorage$NewEntry.getOrCreate(EntrypointStorage.java:117) at net.fabricmc.loader.impl.entrypoint.EntrypointContainerImpl.getEntrypoint(EntrypointContainerImpl.java:53) at net.fabricmc.loader.impl.entrypoint.EntrypointUtils.invoke0(EntrypointUtils.java:47) at net.fabricmc.loader.impl.entrypoint.EntrypointUtils.invoke(EntrypointUtils.java:35) at net.fabricmc.loader.impl.launch.knot.Knot.init(Knot.java:157) at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:71) at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23) Caused by: java.nio.file.FileSystemException: C:\PROGRA~3\Temp\optifabric721004557840756084\Optifine-remapped.jar: Incorrect function at java.base/sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:92) at java.base/sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:103) at java.base/sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:108) at java.base/sun.nio.fs.WindowsLinkSupport.getFinalPath(WindowsLinkSupport.java:82) at java.base/sun.nio.fs.WindowsLinkSupport.getRealPath(WindowsLinkSupport.java:241) at java.base/sun.nio.fs.WindowsPath.toRealPath(WindowsPath.java:933) at java.base/sun.nio.fs.WindowsPath.toRealPath(WindowsPath.java:42) at jdk.zipfs/jdk.nio.zipfs.ZipFileSystemProvider.newFileSystem(ZipFileSystemProvider.java:108) at java.base/java.nio.file.FileSystems.newFileSystem(FileSystems.java:339) at java.base/java.nio.file.FileSystems.newFileSystem(FileSystems.java:288) at net.fabricmc.tinyremapper.OutputConsumerPath.<init>(OutputConsumerPath.java:113) at net.fabricmc.tinyremapper.OutputConsumerPath.<init>(OutputConsumerPath.java:47) at net.fabricmc.tinyremapper.OutputConsumerPath$Builder.build(OutputConsumerPath.java:76) at me.modmuss50.optifabric.mod.OptifineSetup.remapOptifine(OptifineSetup.java:219) ... 27 more