Error: Could not authenticate server license key. Invalid key format

Support Fin Updated 2 Oct 2026 121 views

This issue is caused by an Invalid Authentication Key, you can fix this by heading over to keymaster and getting a free key for your server.

When you have got a key, head over to the Settings page on your server, and paste the key into the fivem license box.

Click Update and then restart your server,

In some cases you may need to click Reinstall

Still stuck? Our team can look at your server with you.
Open a ticket
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