Message
Could not start the tunnel: no system tunnel
Could not start the tunnel: no system tunnel: what the ForestVPN message ne.no_tun_fd means, why it appears and what to do about it.
Updated October 11, 2026
The app says: "Couldn't start the tunnel."
What it means
The operating system did not give ForestVPN a network tunnel to use.
What to do
Try again, up to three times. If it still fails, use Report a problem in the app.
Why it happens
The system was busy, or still installing an app update over a running tunnel.
Where you see it
The ForestVPN apps show this message on the connection screen, and in a notification when it affects your connection. The code is ne.no_tun_fd.