Is Error 279 always caused by VPN?
No. It is a general connection error: Roblox servers, network, DNS, firewall or ISP routing can be the cause.
Roblox Error 279
Roblox Error 279: what to do with VPN
Error 279 usually means Roblox failed to connect to a game server. In Russia it can look like a generic network issue, so separate Roblox server status, ISP routing, DNS and the VPN client.
What to check first
whether Roblox and the exact game server are online
whether websites open with and without VPN
whether antivirus, DNS or another VPN blocks the connection
whether your WersidePN subscription is refreshed in V2RayTun, Happ or v2rayN
Quick checklist
1
Restart Roblox and try joining another game.
2
Switch between Wi-Fi and mobile data.
3
Refresh the VPN subscription in the client and reconnect.
4
If the error appears only without VPN, test access through WersidePN.
Common questions
Why does one Roblox server work and another fail?
Roblox uses different game servers and routes. A problem can affect only part of them, so test another game or route.