The Ground Branch server is running again. However, there are some troubles with the main server list, so our server is not appearing on the server list at the moment.
You can join the server directly using the console: open 18.104.22.168:7777
If you can't find the console key, take a look at this forum post to change the keybind for console.
For the future I plan to update the server with the latest development build available. This means you might need to switch to the testing branch.
22nd [SAS] Elite Virtual Regiment