Corrupted files

zip END header not found — a mod jar is corrupted or half-downloaded

What the log looks like

zip end header not found
java\.util\.zip\.zipexception
error reading[^\n]{0,40}\.jar
invalid cen header

How to fix it

  1. Delete that jar and download it again — the file is incomplete
  2. An HTML error page saved as .jar gives exactly this error
SeverityStops the game
CategoryCorrupted files

Check your own log

Related errors

Corrupted filesCorrupted Config File (NightConfig ParsingException: Not enough data available)Find the line starting with 'ConfigLoadingException: Failed loading config file' near the top of your crash reCorrupted filesCorrupted Mod Config File (NightConfig ParsingException)Read the `ConfigLoadingException` line near the top of your crash report to find the exact `.toml` filename (fCorrupted filesCorrupted Mod Config File (NightConfig ParsingException: Invalid character)Find the line in your crash report starting with `Failed loading config file` to see the exact `.toml` filenamCorrupted filesFabric Startup Crash: WindowsException (AccessDeniedException or NoSuchFileException)Find the `Caused by: java.nio.file.NoSuchFileException:` or `AccessDeniedException:` line in your crash log anCorrupted filesJsonSyntaxException: Expected BEGIN_OBJECT but was STRING at line 1 column 1Look at the crash report lines directly underneath `at com.google.gson.Gson.fromJson` to identify what was reaCorrupted filesUnable to Launch: ClassNotFoundException FMLTweakerOpen your launcher's root directory (such as `.minecraft` or `MultiMC`), navigate to `libraries/net/minecraftf