I know I need to download the various scenarios into the appropriate battle set but where do I find them?

Thanks in advance.

I'm interested in learning but haven't touched it yet.

Just purchased/downloaded the game. I'm playing build 2008.24. I got the same error playing the training scenario (had to familiarize myself with the controls again).

Also wanted to say how pleased/happy/excited I was to see this game back on the market!