Looking at any solution I find similar error for VirtualBox:
https://www.virtualbox.org/ticket/17425?cversion=0&cnum_hist=3
and I use similar solution with success!
borkowsk@wojciech-CELSIUS-7:~$ ldd /usr/lib/virtualbox/*.so | grep "not found"
borkowsk@wojciech-CELSIUS-7:~$ ldd /usr/lib/virtualbox/components/*.so | grep
"not found"
borkowsk@wojciech-CELSIUS-7:~$ ldd
/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so | grep "not found"
libxcb-xinerama.so.0 => not found
borkowsk@wojciech-CELSIUS-7:~$ ldd /usr/lib/virtualbox/*.so | grep "not"
borkowsk@wojciech-CELSIUS-7:~$ sudo apt --reinstall install libxcb
...
borkowsk@wojciech-CELSIUS-7:~$ konsole &
borkowsk@wojciech-CELSIUS-7:~$ krusader
Invalid Context= "stock" line for icon theme:
"/usr/share/icons/ubuntu-mono-dark/stock/16/"
Invalid Context= "stock" line for icon theme:
"/usr/share/icons/ubuntu-mono-dark/stock/22/"
Invalid Context= "stock" line for icon theme:
"/usr/share/icons/ubuntu-mono-dark/stock/24/"
Invalid Context= "stock" line for icon theme:
"/usr/share/icons/ubuntu-mono-dark/stock/32/"
Invalid Context= "stock" line for icon theme:
"/usr/share/icons/ubuntu-mono-dark/stock/48/"
Invalid Context= "stock" line for icon theme:
"/usr/share/icons/ubuntu-mono-dark/stock/64/"
Invalid Context= "stock" line for icon theme:
"/usr/share/icons/ubuntu-mono-dark/stock/128/"
kf5.kio.core: Refilling KProtocolInfoFactory cache in the hope to find "mtp"
kf5.kio.core: Refilling KProtocolInfoFactory cache in the hope to find "mtp"
kf5.kio.core: Refilling KProtocolInfoFactory cache in the hope to find "mtp"
kf5.kio.core: Refilling KProtocolInfoFactory cache in the hope to find "mtp"
kf5.kio.core: Refilling KProtocolInfoFactory cache in the hope to find "mtp"
kf5.kio.core: Refilling KProtocolInfoFactory cache in the hope to find "mtp"
Still krusader have some warnings but now it can start!
** Bug watch added: Virtualbox Trac #17425
http://www.virtualbox.org/ticket/17425
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https://bugs.launchpad.net/bugs/1772900
Title:
This application failed to start because it could not find or load the
Qt platform plugin "xcb" in "".
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