Dashboard dropdowns and menu editor broken

I love this plugin! It’s a little confusing at first, but seems to be effective.

The only problem is that now, the drop down on hover in the admin menu isn’t working until after I click the link (which kind of defeats the purpose; it’s useable but inconvenient).

What’s more important, is that I can no longer add things to menus, because when I click to expand a section, it does nothing. In fact, nothing expands; or well, it seems as though it tries to, but the only thing that happens is it opens up a tiny bit and there’s nothing inside the tiny space. If there’s anything I can do to help figure this out, I would be happy to.

For the record, I am using Firefox.

https://ww.wp.xz.cn/plugins/polylang/