Can't start virtualbox (virtualbox-ose-5.1.8), this error:
------------
Qt FATAL: This application failed to start because it could not find or load the Qt platform plugin "xcb"
in "".

Available platform plugins are: minimal, offscreen, xcb.

Reinstalling the application may fix this problem.
Abort trap
------------


Maybe some problem with QT5 libraries. My QT libs:
qt5-assistant-5.6.2
qt5-buildtools-5.6.2
qt5-clucene-5.6.2
qt5-concurrent-5.6.2
qt5-core-5.6.2
qt5-dbus-5.6.2
qt5-declarative-5.5.1
qt5-designer-5.6.2
qt5-doc-5.6.2
qt5-examples-5.6.2
qt5-gui-5.6.2
qt5-help-5.6.2
qt5-linguist-5.6.2
qt5-linguisttools-5.6.2
qt5-multimedia-5.6.2
qt5-network-5.6.2
qt5-opengl-5.6.2
qt5-printsupport-5.6.2
qt5-qdoc-5.6.2
qt5-qdoc-data-5.6.2
qt5-qmake-5.6.2
qt5-qml-5.6.2
qt5-quick-5.6.2
qt5-quickcontrols-5.6.2
qt5-script-5.6.2
qt5-sql-5.6.2
qt5-sqldrivers-sqlite3-5.6.2
qt5-svg-5.6.2
qt5-testlib-5.6.2
qt5-uiplugin-5.6.2
qt5-uitools-5.6.2
qt5-webkit-5.6.2
qt5-widgets-5.6.2
qt5-x11extras-5.6.2
qt5-xml-5.6.2
qt5-xmlpatterns-5.6.2
qtkeychain-qt5-0.7.0