Accessing setting triggers this error

Settings window is not accessible because of the following error.

The settings of extension azan@hatem.masmoudi.org had an error:

Error: No property margin_left on GtkStackSwitcher

Stack trace:

_init/Gtk.Widget.prototype._init@resource:///org/gnome/gjs/modules/core/overrides/Gtk.js:45:40
_init@/home/aeldemery/.local/share/gnome-shell/extensions/azan@hatem.masmoudi.org/prefs.js:212:30
wrapper@resource:///org/gnome/gjs/modules/script/_legacy.js:83:27
buildPrefsWidget@/home/aeldemery/.local/share/gnome-shell/extensions/azan@hatem.masmoudi.org/prefs.js:351:18
_init@resource:///org/gnome/Shell/Extensions/js/extensionsService.js:209:40
OpenExtensionPrefsAsync/<@resource:///org/gnome/Shell/Extensions/js/extensionsService.js:122:28
asyncCallback@resource:///org/gnome/gjs/modules/core/overrides/Gio.js:115:22
run@resource:///org/gnome/Shell/Extensions/js/dbusService.js:177:20
main@resource:///org/gnome/Shell/Extensions/js/main.js:19:13
run@resource:///org/gnome/gjs/modules/script/package.js:206:19
start@resource:///org/gnome/gjs/modules/script/package.js:190:8
@/usr/share/gnome-shell/org.gnome.Shell.Extensions:1:17