qt.qpa.xcb: could not connect to display

This error message typically indicates that the application is trying to connect to an X11 display server, but it is unable to establish a connection. There are a few potential causes for this error:

1. The X11 display server may not be running or may not be configured correctly.
2. The DISPLAY environment variable may not be set correctly.
3. The user running the application may not have permission to access the X11 display server.

To resolve this error, you can try the following:

1. Make sure the X11 display server is running and properly configured.
2. Check that the DISPLAY environment variable is set correctly, for example:

export DISPLAY=:0

3. Ensure that the user running the application has permission to access the X11 display server, for example, by adding the user to the "video" group:

sudo usermod -aG video <username>

If these steps do not resolve the issue, there may be a more specific problem with the application or the system configuration, and additional troubleshooting may be necessary.