Update Client won't start (libffi6 missing)

Problem: The Dyn Updater fails to start because the required libffi6 library is not available (Ubuntu now uses libffi7, libffi8, etc).

Workaround: Download and install the legacy library package:

wget http://archive.ubuntu.com/ubuntu/pool/main/libf/libffi/libffi6_3.2.1-8_amd64.deb
sudo dpkg -i libffi6_3.2.1-8_amd64.deb

No tray icon in Ubuntu (Gnome shell)

Problem: The Dyn Updater runs but no system tray icon appears. This is because default Gnome (Ubuntu 18.04+) removed legacy tray icon support.

Workaround: Use the TopIcons Plus GNOME Shell extension to restore tray icon visibility.

Steps:

1. sudo apt install gnome-shell-extension-top-icons-plus
2. Log out and log back in to Gnome.
3. Open Tweaks (available as "GNOME Tweaks" or "Tweaks" in the app menu).
4. Enable Topicons plus under the "Extensions" tab.
5. Start dyn_updater (the tray icon should now appear).

More info and troubleshooting: TopIcons Plus on GitHub

If you still have issues, see our main workaround page or contact support.