Mod conflicts

Cannot Create a FluidStack from a Null Fluid

What the log looks like

java\.lang\.IllegalArgumentException: Cannot create a fluidstack from a null fluid
Cannot create a fluidstack from a null fluid\s+at net\.minecraftforge\.fluids\.FluidStack\.<init>

How to fix it

  1. Check the first stacktrace line directly beneath `net.minecraftforge.fluids.FluidStack.<init>` (for example, `buildcraft` or `tconstruct`) to identify which mod owns the broken machine or GUI.
  2. Update that specific mod to its latest build for your Minecraft version, as many older machine mods had known GUI packet bugs when tanks emptied.
  3. If this happens on a multiplayer server, ensure your client `mods` and `config` folders match the server so fluid IDs line up properly.
  4. If you recently removed a mod that added liquids, break the affected tank, engine, or smeltery controller in-game without right-clicking its GUI, or remove the block using a world editor after backing up your world.
LoadersForge
SeverityStops the game
CategoryMod conflicts

Check your own log

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