Is there anyone solution for this?
I'm not sure what you did beforehand, but it means you entered a state the editor can not handle. Typically you can save the map and then restart the editor.
I have found an issue about the editor changing the coordinates of every units in the original file after I save. I am editing a campaign map and then the issue came. I tested it by playing with the supcom fa game client. The game does not progress at all.
Is there a solution to this issue?
Update guys, looks like it works. Once I add or remove units I have to save but not after the error appears. If you have saved after the error appears then the issue on changing the names and the coordinates of every unit will happen and that will not synchronized with the original script.lua file causing the mission map to be corrupted.