Gnome shell 40.4: No property border_width on GtkBox

[pratikbin]

Error: No property border_width on GtkBox

Stack trace:
  _init/Gtk.Widget.prototype._init@resource:///org/gnome/gjs/modules/core/overrides/Gtk.js:45:40
  _init@/home/pratik/.local/share/gnome-shell/extensions/[email protected]/prefs.js:24:20
  wrapper@resource:///org/gnome/gjs/modules/script/_legacy.js:83:27
  _Base.prototype._construct@resource:///org/gnome/gjs/modules/script/_legacy.js:19:10
  newClass@resource:///org/gnome/gjs/modules/script/_legacy.js:115:21
  buildPrefsWidget@/home/pratik/.local/share/gnome-shell/extensions/[email protected]/prefs.js:75:18
  _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