Mobile menu doesn’t work

Hi!

I’m having a little problem that seems weird to me. But I don’t have in depth knowledge about coding so it might make a lot of sense to you guys. Anyway, I hope you can help me with this!

So I installed a SSL certificate trough Directadmin, and since then some scripts seem to be not functioning anymore. My biggest concern is the mobile menu not working again. It seems active as you can click on it, but it doesn’t seem to run any script. I tried disabling all the plugins, but nothing changed. The thing that makes the mobile menu work again is: 1. Using the default twentyseventeen theme. 2. Visiting the site trough http instead of https. So it must be a conflict between something I changed and the SSL certificate. But I really don’t understand why this happens. I removed the line that forces the user to visit the site trough https so you can see it as well. It would be really great if someone could help me out with this!

Thanks so much!

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