When I'm in this location: /en/admin/content/taxonomy/1
The links to the terms point to: /en/taxonomy/term/1
The link to edit points to: /en/admin/taxonomy/edit/term/1?destination=admin%2Fcontent%2Ftaxonomy%2F1
and so on...

the "content" path is missing. As you see I have internationalization installed which might have or not something to do with it.