"QObject::moveToThread" error

[wernerk93]

"QObject::moveToThread: Current thread (0xc096a0) is not the object's thread (0x1201d90).
Cannot move to target thread (0xc096a0)

qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "/usr/local/lib/python3.8/dist-packages/cv2/qt/plugins" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: xcb, eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, webgl.

Aborted"

I have this error when I tried to run "Client"
The "Server" is started but when I go to the "Client" I have this error.

[wernerk93]

I tried on "Debian 12" without gui and "Ubuntu 22" with desktop.