error: exitCode=256

[a1ad]

when taking a screenshot i get the following error code: Error

cat ~/.local/share/gnome-shell/extensions/gnome-shell-screenshot@ttll.de/metadata.json
{
"_generated": "Generated by SweetTooth, do not edit",
"description": "Conveniently create, copy, store and upload screenshots",
"gettext-domain": "gnome-shell-screenshot",
"name": "Screenshot Tool",
"settings-schema": "org.gnome.shell.extensions.screenshot",
"shell-version": [
"3.24",
"3.26",
"3.28"
],
"url": "https://github.com/OttoAllmendinger/gnome-shell-screenshot/",
"uuid": "gnome-shell-screenshot@ttll.de",
"version": 30

gnome-shell --version
GNOME Shell 3.28.3

[OttoAllmendinger]

@a1ad please run this command and paste the output

gjs ~/.local/share/gnome-shell/extensions/gnome-shell-screenshot@ttll.de/auxhelper.js --desktop --filename /tmp/test.png --debug

[a1ad]

@OttoAllmendinger thanks you put me in the right direction, it is a firejail permission issue

Solution:
create file: /etc/firejail/gjs.local with line: "noblacklist ${HOME}/.local/share/gnome-shell"