Ubisoft Connect Error / Won't Launch
What is this error?
Ubisoft Connect client fails to launch, can't go online, or games fail to start through the launcher.
Common causes
- Ubisoft Connect service down
- corrupted Ubisoft Connect cache
- firewall blocking Ubisoft
- DNS resolution failure
- DRM initialization failure
How to fix it
- Clear Ubisoft Connect cache
- check service status
- add to firewall exceptions
- verify game files
Too many steps? Crashless can diagnose this automatically — checks your drivers, temps, VRAM, and 400+ known error patterns.
Get free AI diagnosis Detailed analysis
Ubisoft Connect (formerly Uplay) issues block games like Assassin's Creed, Far Cry, Rainbow Six Siege, and other Ubisoft titles.
Common errors: 'Ubisoft Connect is not available', 'A Ubisoft service is not available at this moment', 'Could not start game'.
How to fix it:
- Check Ubisoft service status at https://ubisoft.com/en-us/help — if servers are down, wait
- Clear Ubisoft Connect cache: close the app, delete %LOCALAPPDATA%\Ubisoft Game Launcher\cache\
- Flush DNS: admin Command Prompt > 'ipconfig /flushdns'
- Add Ubisoft Connect to Windows Firewall: Windows Security > Firewall > Allow an app
- If games won't launch, verify game files: Ubisoft Connect > Games > game tile > Properties > Verify Files
- Try launching in Offline Mode: Settings > General > 'Always start in offline mode' (then disable after it works)
- Disable any VPN or proxy
- Reinstall Ubisoft Connect (games stay installed) — backup the save files from %APPDATA%\Ubisoft\ first
When to seek help
If this error keeps happening after trying the fixes above, it may point to a deeper hardware or system issue. Consider professional help if:
- The crash occurs across multiple games or applications
- You see the same error after a clean Windows install
- Your PC is less than a year old (could be a warranty issue)
- You smell burning or hear unusual sounds from your PC
Or let Crashless do the deep analysis for you -- our AI checks drivers, temps, event logs, and 400+ known patterns automatically.
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