(onboard:6959): dbind-WARNING **: 16:13:23.608: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not provided by any .service files
(onboard:6959): dbind-WARNING **: 16:13:24.328: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not provided by any .service files
(onboard:6959): dbind-ERROR **: 16:13:24.328: AT-SPI: Couldn't connect to accessibility bus. Is at-spi-bus-launcher running?
English 
鸿蒙电脑真机，和deepin有些像，但将deepin还没实现的给实现了。 
系统：deepin V20 最新版
问题描述：更新到系统最新版后无法打开 OnBoard，只有登入系统输入密码的时候可以打开。
终端log:
lee@lee-PC:~$ onboard
/usr/lib/python3/dist-packages/gi/overrides/Gdk.py:461: Warning: g_value_set_boxed: assertion 'G_VALUE_HOLDS_BOXED (value)' failed
initialized, argv = Gdk.init_check(sys.argv)
(onboard:6959): dbind-WARNING **: 16:13:23.608: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not provided by any .service files
16:13:24.022 WARNING Config: mousetweaks GSettings schema not found, mousetweaks integration disabled.
(onboard:6959): dbind-WARNING **: 16:13:24.328: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not provided by any .service files
(onboard:6959): dbind-ERROR **: 16:13:24.328: AT-SPI: Couldn't connect to accessibility bus. Is at-spi-bus-launcher running?
Trace/breakpoint trap
截图：
请问如何解决？？