Modified worlds not loading

I had a world that I already created but I wanted to add an addon to it. Now when I load in it it freezes but my fps does keep changing so I don't know what's wrong. Here is the link to my world:[https://drive.google.com/file/d/1SGUzVNZGOv8T6wqzXdPcw36Z9kP-68eU/view?usp=sharing]|http://example.com/]