# Conan Exiles Server Troubleshooting (/docs/conan-exiles/fix-issues)



import { Step, Steps } from 'fumadocs-ui/components/steps';

Mod Mismatch [#mod-mismatch]

The #1 connection issue. Client and server must have **exact same mods in the same order**.

**Fix:** Ensure players subscribe to all mods and enable them in the correct order. The game shows which mods are missing when joining fails.

**After game updates:** Mods may be outdated. Wait for mod authors to update, or temporarily remove the broken mod.

BattlEye Errors [#battleye-errors]

**"Authentication Failed":**

* Reinstall BattlEye from `ConanSandbox/Binaries/Win64/BattlEye/` — run as Administrator
* Or disable: `IsBattlEyeEnabled=False` in ServerSettings.ini (may be needed for some mods)

Server Not in Browser [#server-not-in-browser]

* Verify `ServerQueryPort=27015` in Engine.ini
* Ensure UDP 27015 is forwarded
* Try adding manually via Steam server browser

Connection Timeout [#connection-timeout]

* Check all ports: 7777, 7778 (UDP), 27015 (UDP)
* Verify game files via Steam
* Allow Conan Exiles through Windows Firewall

Performance Issues [#performance-issues]

* Reduce `MaxAggroRange` (default 1000) — biggest NPC AI overhead setting
* Lower max players if many large bases exist
* Use NVMe storage for faster database reads
* Monitor during Purge events — they cause CPU spikes

Related Guides [#related-guides]

* [Server Configuration](/docs/conan-exiles/server-config)
* [Install Mods](/docs/conan-exiles/mod-setup)
* [Admin Commands](/docs/conan-exiles/admin-setup)