The server has either erred or is incapable of performing the requested operation.
Traceback (most recent call last): File "/layers/google.python.pip/pip/lib/python3.9/site-packages/webapp2.py", line 1573, in __call__ rv = self.handle_exception(request, response, e) File "/layers/google.python.pip/pip/lib/python3.9/site-packages/webapp2.py", line 1567, in __call__ rv = self.router.dispatch(request, response) File "/layers/google.python.pip/pip/lib/python3.9/site-packages/webapp2.py", line 1314, in default_dispatcher return route.handler_adapter(request, response) File "/layers/google.python.pip/pip/lib/python3.9/site-packages/webapp2.py", line 1138, in __call__ return handler.dispatch() File "/srv/main.py", line 76, in dispatch super(SimpleHandler, self).dispatch() File "/layers/google.python.pip/pip/lib/python3.9/site-packages/webapp2.py", line 606, in dispatch return self.handle_exception(e, self.app.debug) File "/layers/google.python.pip/pip/lib/python3.9/site-packages/webapp2.py", line 604, in dispatch return method(*args, **kwargs) File "/srv/main.py", line 94, in get self.simple_get('templates/tou.html', locale) File "/srv/main.py", line 72, in simple_get self.response.write(template.render(server_params)) File "/layers/google.python.pip/pip/lib/python3.9/site-packages/jinja2/environment.py", line 1291, in render self.environment.handle_exception() File "/layers/google.python.pip/pip/lib/python3.9/site-packages/jinja2/environment.py", line 925, in handle_exception raise rewrite_traceback_stack(source=source) File "/srv/templates/tou.html", line 84, in top-level template code <h2>{{ _("サイトの利用にあたって")}}</h2> File "/layers/google.python.pip/pip/lib/python3.9/site-packages/jinja2/utils.py", line 84, in from_obj if hasattr(obj, "jinja_pass_arg"): jinja2.exceptions.UndefinedError: '_' is undefined