@jjohansen @georgiag Thanks for the replies and hints. I didn't have apparmor profile and that fixes the problem. (I have created feature request for electron-builder https://github.com/electron- userland/electron-builder/issues/8635)
Without apparmor profile, an Electron.js app complains: The SUID sandbox helper binary was found, but is not configured correctly. Rather than run without sandboxing I'm aborting now. You need to make sure that /opt/Custom App/chrome-sandbox is owned by root and has mode 4755. So I set SUID as suggested: sudo chmod 4755 "/opt/Custom App/chrome- sandbox" And now, if the path is without space (e.g. /opt/CustomApp), then the Electron app works. When it has a space, it fails with "LaunchProcess: failed to execvp" I have mentioned above. syslog contains logs (stripped prefixes): kernel: audit: type=1400 audit(1729968745.234:136): apparmor="AUDIT" operation="userns_create" class="namespace" info="Userns create - transitioning profile" profile="unconfined" pid=2196 comm="custom-app" requested="userns_create" target="unprivileged_userns" kernel: audit: type=1400 audit(1729968745.236:137): apparmor="DENIED" operation="capable" class="cap" profile="unprivileged_userns" pid=2198 comm="custom-app" capability=21 capname="sys_admin" kernel: traps: custom-app[2196] trap int3 ip:57e938a5c46c sp:7fff1815e5a0 error:0 in custom-app[57e934ad0000+8972000] So, when I do: mv "/opt/Custom App" "/opt/CustomApp" It starts working. (And I do not have any apparmor profile for "/opt/CustomApp"). In syslog, I have just the first message: apparmor="AUDIT" It's possible error message is from Electron.js code. ** Bug watch added: github.com/electron-userland/electron-builder/issues #8635 https://github.com/electron-userland/electron-builder/issues/8635 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to apparmor in Ubuntu. https://bugs.launchpad.net/bugs/2046844 Title: AppArmor user namespace creation restrictions cause many applications to crash with SIGTRAP Status in AppArmor: New Status in Wike: New Status in akonadiconsole package in Ubuntu: Fix Released Status in akregator package in Ubuntu: Fix Released Status in angelfish package in Ubuntu: Fix Released Status in apparmor package in Ubuntu: Fix Released Status in bubblewrap package in Ubuntu: Fix Committed Status in cantor package in Ubuntu: Fix Released Status in devhelp package in Ubuntu: Fix Released Status in digikam package in Ubuntu: Fix Released Status in epiphany-browser package in Ubuntu: Fix Released Status in evolution package in Ubuntu: Fix Released Status in falkon package in Ubuntu: Fix Released Status in firefox package in Ubuntu: Confirmed Status in foliate package in Ubuntu: Fix Committed Status in freecad package in Ubuntu: Invalid Status in geary package in Ubuntu: Fix Released Status in ghostwriter package in Ubuntu: Fix Released Status in gnome-packagekit package in Ubuntu: Invalid Status in goldendict-webengine package in Ubuntu: Fix Released Status in guix package in Ubuntu: Confirmed Status in kalgebra package in Ubuntu: Fix Released Status in kchmviewer package in Ubuntu: Fix Released Status in kdeplasma-addons package in Ubuntu: Fix Released Status in kgeotag package in Ubuntu: Fix Released Status in kiwix package in Ubuntu: Incomplete Status in kmail package in Ubuntu: Fix Released Status in konqueror package in Ubuntu: Fix Released Status in kontact package in Ubuntu: Fix Released Status in loupe package in Ubuntu: Fix Released Status in marble package in Ubuntu: Fix Released Status in notepadqq package in Ubuntu: Fix Released Status in opam package in Ubuntu: Fix Released Status in pageedit package in Ubuntu: Fix Released Status in plasma-desktop package in Ubuntu: Fix Released Status in plasma-welcome package in Ubuntu: Fix Released Status in privacybrowser package in Ubuntu: Invalid Status in qmapshack package in Ubuntu: Fix Released Status in qutebrowser package in Ubuntu: Fix Released Status in rssguard package in Ubuntu: Fix Released Status in steam package in Ubuntu: Fix Released Status in supercollider package in Ubuntu: Fix Released Status in tellico package in Ubuntu: Fix Released Status in tor package in Ubuntu: Confirmed Status in wike package in Ubuntu: Fix Committed Status in apparmor source package in Noble: Fix Released Bug description: Hi, I run Ubuntu development branch 24.04 and I have a problem with Epiphany browser 45.1-1 (Gnome Web): program doesn't launch, and I get this error $ epiphany bwrap: Creating new namespace failed: Permission denied ** (epiphany:12085): ERROR **: 14:44:35.023: Failed to fully launch dbus-proxy: Le processus fils s’est terminé avec le code 1 Trappe pour point d'arrêt et de trace (core dumped) $ epiphany bwrap: Creating new namespace failed: Permission denied ** (epiphany:30878): ERROR **: 22:22:26.926: Failed to fully launch dbus-proxy: Le processus fils s’est terminé avec le code 1 Trappe pour point d'arrêt et de trace (core dumped) Thanks for your help! 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