error message "The application “Script Monitor” is not open anymore." appears then moves my files from its location to Downloads

My Macbook recently started moving my folders' location around when I'm in the middle of working. It would also take individual files out of its folders too. My macbook is running just fine and there are no mysterious applications downloaded. It makes it hard to save file while I'm working since it would randomly do it. At the beginning, it did it without me knowing. but now it does it whenever i get that script monitor error message. Restarting doesn't work.