I suspect Q may work to take you back to your room, or any of the other quick travel shortcuts. Those shortcut keys are, however, only available once you've paired your phone. The backspace key will also take you back a moment. Obviously, the ideal solution is I don't release a game, even a <v1.0, with so many errors, I'm not trying to be the next Bethesda!
I've got that one fixed in the next update. I caught it myself and hoped I'd gotten away with anyone else catching it, clearly not, lol! However, if you go back a few moments (backspace) to before you assigned Rita, then start the building and assign her after, it should hopefully work. Alternatively, if you send me your savefile, I'll fix it for you manually, so you can continue without waiting on an update.
EDIT: Scratch that, rechecking your screenshot, that's not the issue. That was actually part of the hotfix I already put out. This issue is that there's already an ongoing project - Larger Facility. I'll make it so in the next version you can't build anything other than the monitoring station at the start. The offer stands on the savefile fix, though.