awn applet critical

[wiko]

Awn-Applet configuration crash and doesn't work . Impossible to configure awn settings

(avant-window-navigator:31405): CRITICAL **: desktop_agnostic_config_new_for_instance: assertion 'schema != NULL' failed
Screen is composited

** (awn-applet:31409): WARNING **: Helpers are not available...
Please make sure you have dockmanager package installed.

** (awn-applet:31409): CRITICAL **: desktop_agnostic_config_schema_get_metadata_option: assertion 'self != NULL' failed

** (awn-applet:31409): CRITICAL **: desktop_agnostic_config_new_for_instance: assertion 'schema != NULL' failed

** (awn-applet:31407): CRITICAL **: desktop_agnostic_config_schema_get_metadata_option: assertion 'self != NULL' failed

** (awn-applet:31407): CRITICAL **: desktop_agnostic_config_new_for_instance: assertion 'schema != NULL' failed

(awn-applet:31407): GLib-GObject-WARNING **: invalid cast from 'DBusGProxy' to 'DockManager'

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Operating system : Linux Mint 16 petra (x86)
Session : Cinnamon