Tribblix: cannot start xfce

I installed the illumos (opensolaris) distro Tribblix and can't start Xfce. I tried both with a display manager, slim (I know it's old, but it's the only one they offer), and from the console. The default Xorg WM, twm, however, works perfectly as long as I don't try to run a Xfce programme (e.g. Thunar or Mousepad). Then the entire X server crashes. I've linked to some logs I thought were relevant. Please help! Xfce log: https://pastebin.com/wQfFBmaX Xorg log: https://pastebin.com/fYX8NTmJ