Oh no, I'm so sorry about that. We'll be sure to go over what happened there and get it fixed!
We've been trying, but the problem is that you're getting an error because of something that isn't there in the code. On our ends we do have that code and we can't replicate the error. Maybe something went wrong specifically with your download of the game. You could try deleting the game, reloading it, and starting a new file. I know that'd be quite inconvenient, but I'm not sure there's any other way to get your game to notice the code that's already there. I'm sorry about this!
Thank you so much for being so understanding! I'm really glad you like the game ;v;
You can delete your save files by hovering over them and pressing the delete key on your keyboard. Then you can start a new file with the new build you downloaded. It's fine if not all the information is wiped clean, so don't worry about going that far. As long as you start a fresh file, it should be alright.