The requested operation requires elevation.
ERROR: Windows route add command failed [adaptive]: system() returned
I can connect to my server, however I can't add the route to my Tomato router, therefore my traffic does not route through the Tomato VPN server.
For those who are experiencing the same error, I found it on requires a simple fix. First you have to configure the GUI such that it works with your ovpn and your static.key file. Instead of using the connect.ovpn file from anywhere, you can connect by using the GUI which came with the installer. The trick is to run the GUI as administrator, this can fix this error and I can connect to the VPN server.
One trick is to run OpenVPN as a service and run as administrator, you can also make your computer connect automatically each time you logon.