Some VPN customers on Windows are having the error "Failed to write the VPN config"

[bsclifton]

Description

Some VPN customers are getting an error on Windows when they pick a server and the config is written (using RAS on Windows, for the IKEv2 connection).

One workaround we've had in the past is to either go to VPN on system and clear all connections OR delete the rasphone.pbk file located at %APPDATA%\Microsoft\Network\Connections\Pbk. Sometimes a reboot is required. However, this has not been working for affected customers.

Folks affected seem to be an admin on the machine. PowerShell sets some of the IKEv2 connection params:
#30904

However, if it fails there would still be evidence of a connection (ex: there would be an entry in %APPDATA%\Microsoft\Network\Connections\Pbk). In the reported cases, there is nothing there.

Steps to Reproduce

Unknown - need more help here

Actual result:

Expected result:

The config should have permission to write. If we have a way to capture and display the error, we should show that

[bsclifton]

Will become less of an issue as we move towards WireGuard on Windows. See #29253

[Shznakl]

We have tagged 26 tickets with this error. Most have closed due to no reply from the customer. This is seen on Windows 10 and Windows 11.

[Shznakl]

Confirmed with one customer that the steps below do not resolve the issue either.

Please try to connect the Brave VPN once more and even when you receive the error message, then kindly use these steps to see if you are able to resolve this error message.

1. Press the Windows key and type: Find and Fix network problems
2. Please click on the option that comes up in the Control Panel.
3. Select Troubleshoot my connection to the Internet

Result: it completed and said it did not detect any issues. The VPN was still unable to activate so there was otherwise no issues with my internet connection.