why is my vpn not working

Have you checked whether the VPN is actually connected after signing in? Signing in alone doesn't always mean it's running. I'd check whether there's a Connect button or any error message first, since the fix depends on what happens when you try to connect. If this is Mozilla VPN, try closing the app completely and reopening it, then try connecting again. Mozilla also recommends checking for app updates if it still won't connect. Can you tell me what happens after you sign in? Does the Connect button do nothing, does it show an error, or does it say connected but websites won't load?