OpenCV cv2.imshow is not working because of the qt

Question

I am having a problem that I can not use cv2.imshow() because of following error message

qt.qpa.plugin: Could not find the Qt platform plugi

Answer 1

I had the same issue after updating opencv - python to 4.2.0.32.

Uninstall opencv-python and install the lower version (e.g pip install opencv-python==4.1.0.25) solves this issue.