Ok, thank you!
I saw this dialog, but I took the first sentence as an invitation to continue. I loved this map.
Best

Hello,
I completed the tutorial storyline, which ends with “I am ready to go” when the engineer packs his car, and I've been playing a few more hours. But not able to do research anymore. My tech tree only leads to dead ends, although I saw the complete tree is much bigger. Only when checking techs ...