Toggle Not Working

Hi, the toggle is not working on my site. I deactivated all the other plugins but the table of contents one and it still did not work. I also deleted all the extra CSS to see if that was causing an issue and it did not fix it. I like the plugin to have the TOC already closed to start but that doesn’t work either.

The toggle was working well for a month or so and then recently just stopped.

Would you please help me to get the toggle working?

The page I need help with: [log in to see the link]