I use Freecad since more than 5 years on Ubuntu.
Freecad, channel stable, doesn't start anymore on all my Ubuntu machines installed with Ubuntu 26.04 (kept up-to-date). Channel edge however, does start.
Summary of the error (when started "freecad" in the terminal):
"Failed to create wl_display (No such file or directory) (qt.qpa.plugin) From 6.5.0, xcb-cursor0 or libxcb-cursor0 is needed to load the Qt xcb platform plugin."
Full text of the error massage:
Warning: Schema “org.gnome.system.locale” has path “/system/locale/”. Paths starting with “/apps/”, “/desktop/” or “/system/” are deprecated.
Warning: Schema “org.gnome.system.proxy” has path “/system/proxy/”. Paths starting with “/apps/”, “/desktop/” or “/system/” are deprecated.
Warning: Schema “org.gnome.system.proxy.http” has path “/system/proxy/http/”. Paths starting with “/apps/”, “/desktop/” or “/system/” are deprecated.
Warning: Schema “org.gnome.system.proxy.https” has path “/system/proxy/https/”. Paths starting with “/apps/”, “/desktop/” or “/system/” are deprecated.
Warning: Schema “org.gnome.system.proxy.ftp” has path “/system/proxy/ftp/”. Paths starting with “/apps/”, “/desktop/” or “/system/” are deprecated.
Warning: Schema “org.gnome.system.proxy.socks” has path “/system/proxy/socks/”. Paths starting with “/apps/”, “/desktop/” or “/system/” are deprecated.
FreeCAD 1.1.1, Libs: 1.1.1R44227 +647 (Git)
(C) 2001-2026 FreeCAD contributors
FreeCAD is free and open-source software licensed under the terms of LGPL2+ license.
Adding snap-specific PYTHONPATH to sys.path: /home/harm/snap/freecad/common/.local/lib/python3.12/site-packages:/snap/freecad/2337/lib/python3.12/site-packages:/snap/freecad/2337/usr/lib/python3/dist-packages
Failed to create wl_display (No such file or directory)
(qt.qpa.plugin) From 6.5.0, xcb-cursor0 or libxcb-cursor0 is needed to load the Qt xcb platform plugin.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.