Do you have gtk2 libraries installed?
Try the following on a terminal:
~]$ ldd -v /opt/openoffice4/program/libvclplug_gtk.so
In my system, this reports a missing library:
...
libgdk_pixbuf_xlib-2.0.so.0 => not found
...
Find the package which provides this library, and install it:
[root@localhost ~]# dnf whatprovides */libgdk_pixbuf_xlib-2.0.so.0
Last metadata expiration check: 19:02:19 ago on Sun Jul 24 18:10:21 2016.
gdk-pixbuf2-xlib-2.34.0-1.fc24.i686 : Additional library for using gdk-pixbuf with bare xlib
Repo : fedora
gdk-pixbuf2-xlib-2.34.0-1.fc24.x86_64 : Additional library for using gdk-pixbuf with bare xlib
Repo : fedora
[root@localhost ~]# dnf install gdk-pixbuf2-xlib
Do the same with every missing library. Then, export the following variables:
~]$ export SAL_USE_VCLPLUGIN="gtk"
~]$ export OOO_FORCE_DESKTOP="gnome"
Now run AOO on that terminal