Creating the path solves the problem. But what about players who don't have D: disk?
Also I have found that restoring the game has a bug: buildings next to the borders (right & left) are missing when you click "continue the game". They exist, but their animations aren't loaded. After some reloads also part of my batteries are missing. I can upgrade them, but I can't see them.
Second thing is that I haven't managed to clear all the terrain. The "clear" tool shows me that I can erase a piece of wood, but when I left-click, nothing happen. Part of this problem was solved by reloading the map or reusing the tool (disable, enable again), but two pieces left and I can't do anything with them.