I get following error massage when using programs like gnuplot and matplotlib.
"""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: minimal, offscreen, xcb."""
Reinstalling the application did not fix this problem.
I would appreciate if someone could get me some hint in what direction I need to look, because online I could not find much about this issue.