Comment # 1 on bug 1017473 from Frank Kruger

It does not start/work on openSUSE Leap 42.2 either(KDE Plasma 5 LTS):

(radiotray:9881): Gtk-WARNING **: Theme parsing error: gtk.css:68:35: The style
property GtkButton:child-displacement-x is deprecated and shouldn't be used
anymore. It will be removed in a future version

(radiotray:9881): Gtk-WARNING **: Theme parsing error: gtk.css:69:35: The style
property GtkButton:child-displacement-y is deprecated and shouldn't be used
anymore. It will be removed in a future version

(radiotray:9881): Gtk-WARNING **: Theme parsing error: gtk.css:73:46: The style
property GtkScrolledWindow:scrollbars-within-bevel is deprecated and shouldn't
be used anymore. It will be removed in a future version
/usr/lib/python2.7/site-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
cannot import name Gst
Traceback (most recent call last):
  File "/usr/bin/radiotray", line 15, in <module>
    radiotray_runner.main(sys.argv[1:])
  File "/usr/lib/python2.7/site-packages/radiotray/radiotray_runner.py", line
39, in main
    RadioTray()
  File "/usr/lib/python2.7/site-packages/radiotray/RadioTray.py", line 72, in
__init__
    self.audio = AudioPlayerGStreamer(self.mediator, self.cfg_provider,
eventManager)
  File "/usr/lib/python2.7/site-packages/radiotray/AudioPlayerGStreamer.py",
line 55, in __init__
    self.souphttpsrc = Gst.ElementFactory.make("souphttpsrc", "source")
NameError: global name 'Gst' is not defined