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

Available platform plugins are: xcb.

Reinstalling the application may fix this problem.
Aborted (core dumped)

$ pacman -Qs xcb
local/lib32-libxcb 1.15-1
    X11 client-side library (32-bit)
local/libxcb 1.15-1
    X11 client-side library
local/libxkbcommon-x11 1.4.1-1
    Keyboard handling library using XKB data for X11 XCB clients
local/xcb-proto 1.15.2-1
    XML-XCB protocol descriptions
local/xcb-util 0.4.0-4
    Utility libraries for XC Binding
local/xcb-util-cursor 0.1.3-4
    XCB cursor library
local/xcb-util-image 0.4.0-4
    Utility libraries for XC Binding - Port of Xlib's XImage and XShmImage functions
local/xcb-util-keysyms 0.4.0-4
    Utility libraries for XC Binding - Standard X key constants and conversion to/from keycodes
local/xcb-util-renderutil 0.3.9-4
    Utility libraries for XC Binding - Convenience functions for the Render extension
local/xcb-util-wm 0.4.1-4
    Utility libraries for XC Binding - client and window-manager helpers for ICCCM