As in the title, I downloaded and installed the test server client. I also included an older version of the DirectX runtime files within the folder. However, for some reason as soon as I hit play, it says searching for a line to connect like normal, the launcher closes.

And nothing happens.

It does not show up in Task Manager or anywhere, the game just fails to launch. The normal version works fine. The server itself shows it is online and says I played 'Today' despite the game not actually running. Any ideas on how to fix this?