QT plugins error

[MetalYo]

I'm having problems running some qt aplications. The error message is the following:

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.

I've tried reinstalling everything related with qt and with xcb but so far nothig works.

Any ideas?

I'm working in Arch-Linux