Quote Originally Posted by Jeeqbit View Post
After building the very last structure, you have to click the sign again to get the cutscene. If you didn't do that, the next quest doesn't appear, believe it or not. It's caused a lot of confusion.

So click all the signs next to all the buildings in case you didn't finish one of the cutscenes.
This was the problem. I thought I had watched them, but missed one apparently. Thank you