Issues with WordPress 4.4 in admin

Hi!

Just updated my Hueman-themed WordPress site at https://alias.codiferes.net/wordpress and I found out that the admin area is quite a bit b0rked:

1. Only two of the 6-8 panels appear
2. In the “Posts” page, only the last post appears
3. Can’t access the “Extensions” page
3. Drop-down admin menus don’t (drop down, that is)

I’ve checked with other themes, no problem. I just downloaded Hueman 2.2.5 from the web site without any significant impact.

Any tip on how to fix it?

Many thanks in advance!