Officially Fixed

Server Error: Java Version Mismatch

JAVA_VER8,900 reportsUpdated 1/15/2026High

Description

Server fails to start. Console shows class file version errors. Hytale Server requires Java 25 (OpenJDK 25).

Affected Versions: Server v1.0

Solutions (1)

Top Solutionby ServerDoc
3200

Hytale requires Java 25 (Project Valhalla features). Java 8/17/21 will NOT work. Download 'OpenJDK 25.0.1' from Adoptium and set your JAVA_HOME environment variable to point to it.

Still having issues?

  • • Check the r/hytale subreddit for the latest workarounds
  • • Report your issue on the official Hytale Support page
  • • Update your game to the latest version via the Hytale Launcher