Failed to start Minecraft:
java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:196)
at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:231)
at org.multimc.EntryPoint.listen(EntryPoint.java:143)
at org.multimc.EntryPoint.main(EntryPoint.java:34)
Caused by: java.lang.RuntimeException: Failed to read accessWidener file from mod etched
at net.fabricmc.loader.FabricLoader.loadAccessWideners(FabricLoader.java:432)
at net.fabricmc.loader.launch.knot.Knot.init(Knot.java:135)
at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:28)
... 8 more
Caused by: java.lang.RuntimeException: Namespace (named) does not match current runtime namespace (intermediary)
at net.fabricmc.accesswidener.AccessWidenerReader.read(AccessWidenerReader.java:47)
at net.fabricmc.loader.FabricLoader.loadAccessWideners(FabricLoader.java:430)
... 10 more

Should be fixed now, just redownload it. I uploaded a broken file