Emacs/Nautilus don't launch, possible dbus problem

[Freggar]

When trying to launch Emacs or Nautilus I get following error message:

Gtk-WARNING **: Could not load a pixbuf from icon theme.
This may indicate that pixbuf loaders or the mime database could not be found.
**
Gtk:ERROR:gtkiconhelper.c:493:ensure_surface_for_gicon: assertion failed: (destination)

I use VcXsrv as my XServer and already tried to reinstall gdk-pixbuf2 and adwaita-icon-theme and did a
gdk-pixbuf-query-loaders > /usr/lib/x86_64-linux-gnu/gdk-pixbuf-2.0/2.10.0/.

[Freggar]

Ok nevermind, looks like this is a dbus error. I've forgotten to start the dbus-daemon.
Now I'm launching dbus via export $(dbus-launch) but am still facing issues.
The /etc/dbus-1/session.conf:

<busconfig>
  <listen>tcp:host=localhost,port=0</listen>
</busconfig>

Now the error messages have vanished, but Emacs/Nautilus just don't write any ouput/errors but they don't exit either.