Your comments

Any download link for the "dist/js/bootstrap.js" and "dist/css/bootstrap.css"? it seems link to local files

Dear Christian, please check the following link: https://lab.fieldphenomics.com/#publications

This problem can be somewhat fixed if you modify in the F12 console like this:

But it seems only enables the appearance of the dropdown menu, the following <a> tag in <ul> should also need an update by adding 

class="dropdown-item"

But it will still jump to the page top even updates with previous suggestions because href="#", maybe either add a jump id (e.g. herf="#bibbase" or parent container id)

or giving a keyword for the user to specify their own location, for me is the #publications works perfectly

<script src="https://bibbase.org/...&refersh_anchor=publications"></script>