ubuntu software

when I try to open the icon Ubuntu software it dosn t work but when I write on the terminal : Ubuntu software, after a long word list that I have copied above it will works
 software-center/usr/bin/software-center:25: 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, GObject
/usr/share/software-center/softwarecenter/ui/gtk3/views/purchaseview.py:29: PyGIWarning: WebKit2 was imported without specifying a version first. Use gi.require_version('WebKit2', '4.0') before import to ensure that the right version gets loaded.
  from gi.repository import WebKit2 as webkit
2018-02-21 20:44:56,544 - softwarecenter.backend.zeitgeist_logger - WARNING - Support for Zeitgeist disabled
/usr/share/software-center/softwarecenter/ui/gtk3/widgets/symbolic_icons.py:23: PyGIWarning: PangoCairo was imported without specifying a version first. Use gi.require_version('PangoCairo', '1.0') before import to ensure that the right version gets loaded.
  from gi.repository import Gtk, Gdk, GLib, PangoCairo
2018-02-21 20:44:56,651 - softwarecenter.ui.gtk3.app - INFO - setting up proxy 'None'
2018-02-21 20:44:58,977 - softwarecenter.backend.reviews - WARNING - Could not get usefulness from server, no username in config file
2018-02-21 20:44:58,982 - softwarecenter.plugin - INFO - activating plugin '<module 'webapps_activation' from '/usr/share/software-center/softwarecenter/plugins/webapps_activation.pyc'>'
2018-02-21 20:44:59,059 - softwarecenter.db.pkginfo_impl.aptcache - INFO - aptcache.open()
/usr/lib/python2.7/dist-packages/gi/overrides/GLib.py:585: Warning: Source ID 77 was not found when attempting to remove it
  return super(MainContext, self).iteration(may_block)
2018-02-21 20:45:01,176 - softwarecenter.db.update - WARNING - failed to load file /var/lib/apt-xapian-index/cataloged_times.p: unsupported pickle protocol: 3
/usr/share/software-center/softwarecenter/ui/gtk3/widgets/videoplayer.py:29: PyGIWarning: Gst was imported without specifying a version first. Use gi.require_version('Gst', '1.0') before import to ensure that the right version gets loaded.
  from gi.repository import Gst
2018-02-21 20:45:02,864 - softwarecenter.backend.spawn_helper - WARNING - exit code 1 from helper for '['/usr/share/software-center/piston_generic_helper.py', '--datadir', '/usr/share/software-center/', 'SoftwareCenterAgentAPI', 'exhibits', '{"lang": "it", "series": "xenial"}']'
2018-02-21 20:45:02,865 - softwarecenter.backend.spawn_helper - WARNING - got error from helper: 'WARNING:__main__:no data
'
2018-02-21 20:45:03,083 - softwarecenter.db.update - WARNING - failed to load file /var/lib/apt-xapian-index/cataloged_times.p: unsupported pickle protocol: 3
/usr/bin/software-center:184: Warning: Source ID 163 was not found when attempting to remove it
  Gtk.main()
2018-02-21 20:45:04,582 - softwarecenter.backend.spawn_helper - WARNING - exit code 1 from helper for '['/usr/share/software-center/piston_generic_helper.py', '--datadir', '/usr/share/software-center/', 'SoftwareCenterAgentAPI', 'available_apps', '{"lang": "it", "series": "xenial", "arch": "i386"}']'
2018-02-21 20:45:04,583 - softwarecenter.backend.spawn_helper - WARNING - got error from helper: 'WARNING:__main__:no data
'
2018-02-21 20:45:04,583 - softwarecenter.db.update - WARNING - update_from_software_center_agent: error: 'WARNING:__main__:no data\n'
2018-02-21 20:45:04,628 - softwarecenter.db.utils - INFO - software-center-agent finished with status 1