The is caused by either using an incorrect value in the map size, or by having mis-matched map data in your local storage.
The first is fixed by making certain your map size is a value of 1024. 4096, 6144, 8192, 12288. If you put in a value like 8000 for an 8k map the result will be what you posted above.
The second is fixed by clearing your local save data in the game launcher. It's under the tools tab under the Clean game data button.