I'm afraid I can't help you: 2 other people have this issue and nothing looks wrong in the game files. It is working very well on my 2 computers and I have checked everything in Adventure Maker. I hate this automation error, there already were issues with ASA. Maybe the latest version of Myha has a bug or something, and that I am the only one who can run it. If someone else has the issue, please tell me.
I think it could be due to the existence of older savegames (from version 1.0). If you have the time and motivation to restart everything in version 1.2, you can delete the old savegames in your Documents\savegames.
Make sure that you make a clean uninstall of 1.0, then install Myha 1.2 with right click, run as administrator. I'm very sorry that it doesn't work anymore and I hope that you can fix it because I have no more ideas.