KeyError: 'endblock'
File "django/template/base.py", line 470, in parse
compile_func = self.tags[command]
TemplateSyntaxError: Invalid block tag on line 23: 'endblock'. Did you forget to register or load this tag?
(11 additional frame(s) were not displayed)
...
File "django/template/base.py", line 478, in parse
raise self.error(token, e)
File "django/template/base.py", line 476, in parse
compiled_result = compile_func(self, token)
File "django/template/loader_tags.py", line 266, in do_extends
nodelist = parser.parse()
File "django/template/base.py", line 472, in parse
self.invalid_block_tag(token, command, parse_until)
File "django/template/base.py", line 534, in invalid_block_tag
"or load this tag?" % (token.lineno, command)
Rescheduling adhocracy4.emails.tasks.send_async
https://sentry.liqd.net/sentry/product-dev/issues/863/