I have python-xdg installed but I'm still getting the same error so it's not a a forgone conclusion that installing python-xdg as a dependency of radiotray will fix the issue;
swipe@Nuc:~$ sudo apt install python-xdg Reading package lists... Done Building dependency tree Reading state information... Done python-xdg is already the newest version (0.25-4). swipe@Nuc:~$ radiotray /usr/lib/python2.7/dist-packages/radiotray/XmlDataProvider.py:23: PyGIWarning: Gtk was imported without specifying a version first. Use gi.require_version('Gtk', '3.0') before import to ensure that the right version gets loaded. from gi.repository import Gtk /usr/lib/python2.7/dist-packages/radiotray/AudioPlayerGStreamer.py:64: FutureWarning: The behavior of this method will change in future versions. Use specific 'len(elem)' or 'elem is not None' test instead. if(cfg_provider._settingExists("buffer_size")): Sleep Timer, Stops playing after a predefined time, SleepTimerPlugin.py, Carlos Ribeiro StationSwitcher, Allows cycling through stations, StationSwitcherPlugin.py, Mark F HelloWorld, This is a test plugin, HelloWorld.py, Carlos Ribeiro started Notifications, Shows message notifications on the desktop, NotificationPlugin.py, Carlos Ribeiro /usr/share/radiotray/plugins/NotificationPlugin.py:25: PyGIWarning: Notify was imported without specifying a version first. Use gi.require_version('Notify', '0.7') before import to ensure that the right version gets loaded. from gi.repository import Notify Mate Media Keys, Controls Radio Tray through keyboard multimedia keys, MateMediaKeysPlugin.py, Ken Gnome Media Keys, Controls Radio Tray through keyboard multimedia keys, GnomeMediaKeysPlugin.py, Carlos Ribeiro History, Shows song history, HistoryPlugin.py, Carlos Ribeiro -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1557115 Title: [regression] RadioTray won't launch without python-xdg To manage notifications about this bug go to: https://bugs.launchpad.net/gtk/+bug/1557115/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs