Server setup

Failed to setup Fabric server environment

What the log looks like

failed to setup fabric server environment
an exception occurred when launching the server!

How to fix it

  1. The server jar could not fetch or verify the Minecraft server it wraps
  2. Delete the .fabric folder next to the server jar and start again
  3. On an offline machine, put the vanilla server jar beside it manually
LoadersFabric
SeverityStops the game
CategoryServer setup

Check your own log

Related errors

Server setupCould not initialize class RenderSystem — a client mod is on the serverAnything under net.minecraft.client or blaze3d only exists on the clientServer setupFolia Server Error: IllegalStateException: World mismatchUpdate your Folia server JAR to the latest available build, as PaperMC patched the `/time set` synchronizationServer setupFolia: Accessing entity state off owning region's threadCheck the warning line right above the error (for example, 'Global task for <Plugin>' or 'Location task for <PServer setupIllegalArgumentException: Name and ID cannot both be blankCheck the stack trace lines below 'fillProfileProperties' to see the trigger: 'SkullBlockEntity' means a placeServer setupScheduling chunk load off-main (Folia Region Thread Error)Update your Folia server JAR to the latest available build for your Minecraft version, as multiple vanilla mobServer setupYou need to agree to the EULA before the server startsOpen eula.txt next to the server jar and set eula=true