Could not find the Qt platform plugin "wayland"

[jdoma7]

I'm trying to make a face recognition with raspberrypi, and I have a code that opens a camera preview, so i can make infinite photos to make him learn.

The problem is, when I run the code, it comes the following message:

Could not find the Qt platform plugin "wayland"

What should I do??

[asmorkalov]

The QT instance distributed with OpenCV is built without Wayland for now. Related PR (incomplete): #784