World and tick crashes

Lithium Chunk Reset: Could Not Initialize Block State Flags

What the log looks like

java\.lang\.IllegalStateException: Could not initialize block state flags for Block\{
BlockBehaviour\$BlockStateBase\.lithium\$getAllFlags

How to fix it

  1. Close Minecraft immediately without exploring further so no additional chunks are loaded and overwritten.
  2. Open your mods folder, delete lithium-fabric-0.26.0 (or 0.26.1), and install Lithium 0.26.2 or newer from Modrinth or CurseForge.
  3. Double-check your launcher profile or mods folder to make sure an older copy of Lithium is not still active.
  4. Restore your world from a backup made before opening it with Lithium 0.26.0, as updating the mod cannot recover chunks that were already regenerated.
LoadersFabric
SeverityBreaks something
CategoryWorld and tick crashes

Check your own log

Related errors

World and tick crashesAdding Entity to Track (Entity Is Already Tracked)Read the stack trace directly below 'Adding entity to track' or 'spawnEntity' to check if a specific mod or plWorld and tick crashesCreate Contraption Crash: Cannot read field "x" because "mf.axis" is nullUpdate the Create mod (and any Create add-ons) to the latest version newer than 6.0.10, which includes the upsWorld and tick crashesIllegalStateException: Invalid pool element found (minecraft:jigsaw)Back up your world folders before proceeding, especially if you are in the middle of a server version upgrade.World and tick crashesMissing registry entries — a mod was removed from an existing worldPut the removed mod back, load the world once, then remove its blocks in gameWorld and tick crashesReportedException: Saving entity NBT (Invalid Item Data in 1.20.5+)Check the `Caused by: java.lang.IllegalStateException` line at the bottom of the stack trace to identify the eWorld and tick crashesServer thread has not responded — Watchdog shut the server downThe trace printed by the watchdog shows what the tick was busy doing