Mod conflicts

Sodium / Embeddium: java.lang.RuntimeException: Chunk build failed

What it looks like in the log

java.lang.RuntimeException: Chunk build failed

How to fix it

  1. Open the full crash report inside your `crash-reports` folder and scroll down past the main stack trace until you find `Caused by:`—the mod package or block class listed right below `Caused by:` is the actual culprit.
  2. If `mixins.oculus` or `iris` appears in the crash report, update both Embeddium/Sodium and Oculus/Iris to versions explicitly marked compatible with each other, or temporarily remove Oculus/Iris to confirm the conflict.
  3. If you are running Sodium 0.5.x or older on Fabric with mods that add custom blocks, install Indium so mods using the Fabric Rendering API do not crash the chunk builder.
  4. Disable active resource packs and try lowering `Chunk Update Threads` in Video Settings -> Performance to rule out broken custom block models or multithreaded meshing instability.
  5. Before reporting the crash to a mod author, check the `.jar` filename in the trace (`embeddium` vs `sodium`) so you report it to the correct project, and always upload the entire crash report including the `Caused by:` section.
LoadersForge, Neoforge, Fabric, Quilt
SeverityStops the game
CategoryMod conflicts

Check your own logDownload sodium on 9Minecraft

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