Thank you for replying! I ran a couple games just to see how it worked and this is now my first real game. I have almost all the techs researched and have built every building type so far available with about 120 citizens (just to give you a sense of what I know and don't know)You have built a Defense Knowledge gathering outpost in a Plains Biome sector. Hover over the Project Tomorrow InfoBar (below the Parts resource in Resource InfoBar) to see the rate of production.
"Blocked" in the sense that you cannot build any other outpost there, only one outpost per sector (also indicated by the green outline). You "own" the green-outlined sectors, other colors - Red or Yellow - are indicative of other types (bandit territory or Society territory, if you have the New Alliances DLC)
Project Tomorrow will not progress as it is still waiting for an outpost to be build in the Wasteland Biome.