Message
Registering this device again
Registering this device again: what the ForestVPN message cp.device_unknown means, why it appears and what to do about it.
Updated October 11, 2026
The app says: "Registering again."
What it means
ForestVPN's service did not know this device, so the app registers it again.
What to do
Wait a moment. The app tries again by itself.
Why it happens
The device was not registered yet, or its record was removed.
Where you see it
The ForestVPN apps show this message where the step failed: on the Account, Devices or link screens, and on the console at fvpn.net. The code is cp.device_unknown.