This is because of a bug in libvte9.
The path it uses for gnome-pty-helper is:
strings /usr/lib/libvte.so.9|grep gnome-pty-helper /usr/lib/vte/gnome-pty-helper
whereas the libvte9 package puts it in: /usr/lib/libvte9/gnome-pty-helper
ln -s /usr/lib/libvte9 /usr/lib/vte solves it until the package is fixed.
This is because of a bug in libvte9.
The path it uses for gnome-pty-helper is:
strings /usr/lib/ libvte. so.9|grep gnome-pty-helper vte/gnome- pty-helper
/usr/lib/
whereas the libvte9 package puts it in: libvte9/ gnome-pty- helper
/usr/lib/
ln -s /usr/lib/libvte9 /usr/lib/vte solves it until the package is fixed.