I can confirm the escape key generating error repeatedly, despite reload and restart computer.
I fixed it by removing the “Furniture expansion plus” mod I had at the time. Not sure if that’s coincidence, but I installed the mod, and after realizing it doesn’t currently work, I got lazy and didn’t bother to remove it 'cause it was doing nothing. I then made a new game, draw some floor plan, cancelled the building, and since then every time I press escape key the two error boxes appeared… until I removed the mod and started a new game.