Could not load the Qt platform plugin "xcb" in ""

[cookies1109]

(ivs) administrator@ubuntu:~/ivs-demo-master$ python gui.py -seq camel
Interaction Network: initialized
Propagation Network: initialized
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, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, webgl, xcb.

已放弃 (核心已转储)

please help me how to deal with this error.thanks.

[seoungwugoh]

I never seen this issue before.
But, the problem looks related to PyQT5.
Try to re-install the dependancies on brand-new virtual environment.

Seoung Wug

[goncaloxyz]

I managed to fix it bty installing an earlier version:

pip install PyQt5==5.9.2