Stack-trace:
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:413)
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.tryLoadClass(KnotClassDelegate.java:322)
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.loadClass(KnotClassDelegate.java:218)
at net.fabricmc.loader.impl.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:145)
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$NewEntry.getOrCreate(EntrypointStorage.java:117)
at net.fabricmc.loader.impl.entrypoint.EntrypointContainerImpl.getEntrypoint(EntrypointContainerImpl.java:53)
at net.fabricmc.loader.impl.entrypoint.EntrypointUtils.invoke0(EntrypointUtils.java:47)
at net.fabricmc.loader.impl.entrypoint.EntrypointUtils.invoke(EntrypointUtils.java:35)
at net.fabricmc.loader.impl.launch.knot.Knot.init(Knot.java:162)
at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:68)
at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)
Caused by: java.nio.file.FileSystemException: C:\Users\Pc\AppData\Local\Temp\optifabric8270758260582685403\zipfstmp14325380273779607099.tmp -> C:\Users\Pc\AppData\Local\Temp\optifabric8270758260582685403\Optifine-remapped.jar: The process cannot access the file because it is being used by another process
at java.base/sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:92)
at java.base/sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:103)
at java.base/sun.nio.fs.WindowsFileCopy.move(WindowsFileCopy.java:403)
at java.base/sun.nio.fs.WindowsFileSystemProvider.move(WindowsFileSystemProvider.java:293)
at java.base/java.nio.file.Files.move(Files.java:1432)
at jdk.zipfs/jdk.nio.zipfs.ZipFileSystem.sync(ZipFileSystem.java:1855)
at jdk.zipfs/jdk.nio.zipfs.ZipFileSystem.lambda$close$9(ZipFileSystem.java:479)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:569)
at jdk.zipfs/jdk.nio.zipfs.ZipFileSystem.close(ZipFileSystem.java:478)
at net.fabricmc.tinyremapper.OutputConsumerPath.close(OutputConsumerPath.java:226)
at me.modmuss50.optifabric.mod.OptifineSetup.remapOptifine(OptifineSetup.java:225)
... 28 more

Uh...did you have another install open? If not, something was accessing the Optifine-remapped.jar file.

idk what I did, but I just close some background stuff and everything fixed, thank you kind man

I think it's because I just downlaoded he OptiFine with OptiFabric, no other reason seams reasanable