{% extends shell.template_dir|default:"touchtechnology/admin/workbook"|add:"/40x.html" %}
{% comment %}
	Kept so a template that extends "40x.html", as the error pages of a project
	did before the admin had shells, still works. This page adds nothing. It is
	the error page of the shell the admin wears: the shell in the context (the
	"touchtechnology.admin.context_processors.brand" context processor puts it
	there for every page), or Workbook, the default shell, when the context has
	none. Extend that page by its own name instead (see docs/upgrading.md). This
	file will be removed in a later release.
{% endcomment %}