Hey Dave, I managed to turn Bots on. Here's how I did it in-case it doesn't stick.
1.) Go to Clanforge.
2.) Select Server.
3.) Near the bottom you'll see a button called Live Control.
4.)Click the Current Game tab and make sure it's a supported map.
5.)Click the Console tab.
6.)Enter the commands (tf_bot_quota_mode fill, tf_bot_quota 1) into the Console Actions bar.
This will spawn one bot for every human player on the server, up to the max amount of players.
If you need to adjust the bot difficulty, go to the Console tab again and input tf_bot_difficulty X, where X is the difficulty of the bots. It goes from 0-3 and it starts at 1.
You can do all the in-game admin stuff from the Live Control panel, including kick and ban, and I think this is the only way we can do it ATM.