One bad feature of the Blades of Exile game was the password protection on the scenarios. If it is in place you can't edit the exs file, nor can you use the Debug feature while the game is running. (For Debug, hit Shift + D, not too sure what all the options are.)
The only way you can fix an error in a protected scenario, if you don't have the password, is to hex - edit the file. Thus I have included the two files below, in order to give the necessary information.