Corrupted files

IllegalStateException: Not a JSON Object (\u0000 Null Bytes in Config)

What it looks like in the log

java.lang.IllegalStateException: Not a JSON Object: "\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\

How to fix it

  1. Check the stack trace line immediately below com.google.gson.JsonElement.getAsJsonObject to identify which mod owns the broken file (for example, net.irisshaders.iris.config.IrisConfig.load points to Iris Shaders).
  2. Close Minecraft and open your instance's config folder (located inside .minecraft or your launcher's modpack profile directory).
  3. Delete the configuration files belonging to that mod—for Iris, delete iris.properties and any iris*.json files—so the mod can generate clean defaults on the next launch.
  4. If another mod is listed or the crash persists, check recently modified .json files in your config and instance folders with a text editor (such as Notepad++), delete any file that appears completely empty or filled with NUL characters, and restart the game.
LoadersFabric, Quilt, Neoforge, Forge
SeverityStops the game
CategoryCorrupted files

Check your own logDownload iris on 9Minecraft

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 filesCrash on Launch: ClassNotFoundException: org.objectweb.asm.tree.ClassNodeIn third-party launchers such as HMCL or PCL2, open the download settings and switch the download mirror back Corrupted filesIris Failed to Create shaderpacks Directory (Symbolic Link Exists)Update Iris Shaders to version 1.1.4 or newer, where symbolic link detection for the shaderpacks folder is fixCorrupted filesJsonSyntaxException: Expected BEGIN_OBJECT but was STRING (Corrupted JSON File)Check the stack trace lines directly beneath 'Caused by: com.google.gson.JsonSyntaxException' in your log to sCorrupted filesNoClassDefFoundError on a mod class — that mod did not loadThe first word of the class path is the mod id — that is the mod that failed to loadCorrupted filesTotem Counter Crash: ExperimentalConfig.isDisableArmorStands() is NullClose Minecraft and open your game directory's `config` folder.