Menu doesn’t drop down on certain pages

When I go on mobile, the menu does appear throughout everything and it does work when I’m on majority of the pages and posts, but when I’m on certain pages (novel chapter pages), the menu doesn’t drop down. It appears, but it doesn’t drop down.

Examples:
This
This
This

As you can see, they are all chapter pages heavy in word count. Is that why? It seems to be only these pages that fail to work. Oh, and I’m not sure if this has anything to do with it, but this Uncaught TypeError appears on the chapter pages only, from what I see. If it does, then please help me solve it.

Thank you!

• This topic was modified 6 years, 11 months ago by vintaege.

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