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Mods Not Loading or Harmony Errors

Tags: mods, harmony, troubleshooting, server

Most mod load failures come from folder structure, missing Harmony, or EAC conflicts. Use this checklist to stabilize modded servers.

Free tool: To rule out a structural cause first, paste your Mods folder listing into the free 7 Days to Die Mod Checker, which spots missing dependencies and folder-structure mistakes that stop mods loading.

Verify the Mods folder

  • Use a single Mods folder at the server root.
  • Avoid nested folders like Mods/ModName/ModName.
  • Remove duplicate versions of the same mod.

Install Harmony correctly

  • Install the official TFP Harmony mod once.
  • Keep the same Harmony version on server and clients.
  • Update Harmony after major game patches.

Branch matters for mods. Builds for V2.6 stable and V3.0 "Dead Hot Summer" experimental (the Steam beta branch latest_experimental) are not interchangeable, so a mod compiled against V2.6 can throw Harmony patch errors on V3.0. Match the mod version to the branch, and make sure the client and server run the same branch or players hit an invalid version error - see Version Mismatch.

EAC and crossplay

  • Most mods require EACEnabled set to false.
  • Crossplay servers must stay vanilla with EAC on.
  • Do not mix modded clients with vanilla servers.

Isolate conflicts

  1. Disable all mods and verify the server loads.
  2. Add mods back in small batches.
  3. Check logs for the first red error after each batch.

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