could not connect to display

[GimenaA]

Hello,
I installed ClearMap in Linux (Ubuntu 22.04.4). The installation finished and said "ClearMapUi39 installed." However, when I try to run clearmap-ui after I activate the environment, I get the following error message:

**qt.qpa.xcb: could not connect to display
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" 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: eglfs, minimal, minimalegl, offscreen, vnc, webgl, xcb.

Aborted (core dumped)**

How can I fix this issue?

Thank you for your help.