Solved This application failed to start because it could not find or load the Qt platform plugin "xcb" in ""

[talsamon]

The recent update of the qt5* ports puzzled some things, could not update cause of net/qt5-networking is broken with security/libressl. I reverted the partial update. After this I got the error.
Problem with multimedia/vlc and graphics/xpdf (maybe, with some more). How to fix?

 

[talsamon]

Solved: I overlooked two qt5 packages to downgrade.