Had you completed all of the objectives listed at the top of the screen? What was the last objective you had? Feel free to attach the screenshot to an e-mail to support@stardock.com.
I just played through the campaign and didn't run into this issue so hopefully it's not everyone that runs into it.
To be fair I wanted to do my own thing in that campaign mission and therefore was not paying attention to the objectives. The lack of audio ques or constant visual prompts also made them easy to ignore. I'm guessing the little man running in place is likely a visual bug more than a game breaking bug.
I ran through campaign #3 again and followed the objectives until it left me alone to attack both enemy camps. This time there was no little man left after defeating the enemy camp on the left and then defeating the second enemy camp I was able to complete the campaign.
So that leaves the in-game bug reporting issue.
