Drop down menu no longer working

Hello! I hope you can help me. I have the Highend theme, and noticed my dropdown menus have recently stopped showing up. The only change I have made is to add a new intro home page and have a button that takes you to a second home page with All Posts on it.
I have also recently updated to the latest version of Word Press, and the latest version of the Highend Theme, still having the problem.

I’m very new to wordpress and the backend code, so you’ll have to be detailed with your responses.. thank you! 🙂

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