We will release a hotfix in a couple of hours which tries to quick fix this problem but we will leave the ticket open to investigate deeper at a later time to fix it properly.
Please let us know if it helps once you updated to version 1.4.0f10.
Cheers

It could be caused by threat avoidance on path finding.
Might it be that there were a plenty of (dead) enemies on the (only) path to the prison?
Workers may try to avoid them and take another path, which finally gets so long that they give up.
At least this is my only theory so far how this could happen.

This sounds not like a bug, more like a feature :)

Nice to hear Schalk :)
Have fun with the new Patch!

(To translate my gibberish: the alert was accidentally always triggered when the Barracks was big enough and not when it was too small)

Normally the game was supposed to show a dialogue informing about this or any other starting problem.
However it did not work and it simply quit the game before there was a chance to look at the dialogue.
This is now fixed and when any loading error occurs the game will now correctly show a dialogue
and only quits the game after the "OK" button was clicked.

Your report helped us to find this little flaw :)

Yes if this report is about the same issue as reported here:
http://steamcommunity.com/app/230190/discussions/0/350532536098285312/
then it is fixed indeed :)

Fixed :)