The VPN Client stopped working since the latest macOS update (Ventura 13.3.1(a)). When trying to set up a VPN connection you will receive error "OpenVPN: exiting due to fatal error. (744)"
Unsure about your macOS version? Click the Apple menu in the upper-left corner and choose "About this Mac". Alternatively, you can open a terminal and enter the command: sw_vers .
The VPN Client checks the version of your OS to determine if it has to use a TUN or TAP network interface. The notation (syntax) of the version changed in macOS version 13.3.1(a). As a result, the VPN Client is unable to determine the OS version and thus will default to TAP instead of TUN, which doesn't work on macOS.
We are actively working on a solution. In the meantime, the workaround is to revert back to macOS version 13.3.1 by uninstalling the latest macOS patch.