extends must be the first tag in the template. [Ticket#751089]

Internal Server Error: /person/3033/edit/

TemplateSyntaxError at /person/3033/edit/
must be the first tag in the template.

Request Method: POST
Request URL: [1] https://info.katharineum.de/person/3033/edit/
Django Version: 3.2.11
Python Executable: /usr/bin/uwsgi-core
Python Version: 3.9.2
Python Path: ['/srv/aleksis', '.', '', '/usr/lib/python39.zip', '/usr/lib/python3.9', '/usr/lib/python3.9/lib-dynload', '/srv/aleksis/envs/production/lib/python3.9/site-packages']
Server time: Fri, 28 Jan 2022 12:10:38 +0100
Installed Applications:
['django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.sites',
'django.contrib.staticfiles',
'django.contrib.humanize',
'django_uwsgi',
'django_extensions',
'guardian',
'rules.apps.AutodiscoverRulesConfig',
'haystack',
'polymorphic',
'dj_cleavejs.apps.DjCleaveJSConfig',
'dbbackup',
'django_celery_beat',
'django_celery_results',
'celery_progress',
'health_check.contrib.celery',
'djcelery_email',
'celery_haystack',
'sass_processor',
'django_any_js',
'django_yarnpkg',
'django_tables2',
'maintenance_mode',
'menu_generator',
'reversion',
'phonenumber_field',
'debug_toolbar',
'django_prometheus',
'django_select2',
'templated_email',
'html2text',
'django_otp.plugins.otp_totp',
'django_otp.plugins.otp_static',
'django_otp',
'otp_yubikey',
'aleksis.core',
'allauth',
'allauth.account',
'allauth.socialaccount',
'invitations',
'health_check',
'health_check.db',
'health_check.cache',
'health_check.storage',
'health_check.contrib.psutil',
'health_check.contrib.migrations',
'dynamic_preferences',
'dynamic_preferences.users.apps.UserPreferencesConfig',
'impersonate',
'two_factor',
'material',
'ckeditor',
'ckeditor_uploader',
'django_js_reverse',
'colorfield',
'django_bleach',
'favicon',
'django_filters',
'oauth2_provider',
'rest_framework',
'extra_views',
'feeds',
'aleksis.apps.untis.apps.UntisConfig',
'aleksis.apps.hjelp.apps.HjelpConfig',
'aleksis.apps.resint.apps.ResintConfig',
'aleksis.apps.abi.apps.DefaultConfig',
'aleksis.apps.alsijil.apps.AlsijilConfig',
'aleksis.apps.donations.apps.DonationsConfig',
'aleksis.apps.fritak.apps.FritakConfig',
'aleksis.apps.ldap.apps.LDAPConfig',
'aleksis.apps.csv_import.apps.CSVImportConfig',
'aleksis.apps.chronos.apps.ChronosConfig',
'aleksis.apps.order.apps.DefaultConfig',
'aleksis.apps.dashboardfeeds.apps.DefaultConfig',
'aleksis.apps.evalu.apps.DefaultConfig',
'cachalot',
'django_cleanup.apps.CleanupConfig']
Installed Middleware:
['django_prometheus.middleware.PrometheusBeforeMiddleware',
'django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'debug_toolbar.middleware.DebugToolbarMiddleware',
'django.middleware.locale.LocaleMiddleware',
'django.middleware.http.ConditionalGetMiddleware',
'django.contrib.sites.middleware.CurrentSiteMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django_otp.middleware.OTPMiddleware',
'impersonate.middleware.ImpersonateMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
'maintenance_mode.middleware.MaintenanceModeMiddleware',
'aleksis.core.util.middlewares.EnsurePersonMiddleware',
'django_prometheus.middleware.PrometheusAfterMiddleware']

Traceback (most recent call last):
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/django/core/handlers/exception.py", line 47, in inner
   response = get_response(request)
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/django/core/handlers/base.py", line 181, in _get_response
   response = wrapped_callback(request, *callback_args, **callback_kwargs)
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/sentry_sdk/integrations/django/views.py", line 67, in sentry_wrapped_callback
   return callback(request, *args, **kwargs)
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/django/views/generic/base.py", line 70, in view
   return self.dispatch(request, *args, **kwargs)
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/reversion/views.py", line 28, in do_revision_view
   response = func(request, *args, **kwargs)
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/django/utils/decorators.py", line 43, in _wrapper
   return bound_method(*args, **kwargs)
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/django/views/decorators/cache.py", line 44, in _wrapped_view_func
   response = view_func(request, *args, **kwargs)
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/django/contrib/auth/mixins.py", line 104, in dispatch
   return super().dispatch(request, *args, **kwargs)
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/django/views/generic/base.py", line 98, in dispatch
   return handler(request, *args, **kwargs)
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/django/views/generic/edit.py", line 194, in post
   return super().post(request, *args, **kwargs)
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/django/views/generic/edit.py", line 142, in post
   return self.form_valid(form)
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/aleksis/core/views.py", line 456, in form_valid
   self.object.notify_about_changed_data(send_notification_fields)
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/aleksis/core/models.py", line 389, in notify_about_changed_data
   send_email(
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/aleksis/core/util/email.py", line 24, in send_email
   return send_templated_mail(
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/templated_email/__init__.py", line 66, in send_templated_mail
   return connection.send(template_name, from_email, recipient_list, context,
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/templated_email/backends/vanilla_django.py", line 251, in send
   e = self.get_email_message(template_name, context, from_email=from_email,
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/templated_email/backends/vanilla_django.py", line 132, in get_email_message
   parts = self._render_email(template_name, context,
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/templated_email/backends/vanilla_django.py", line 106, in _render_email
   response[part] = render_block_to_string(full_template_names, part, render_context)
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/render_block/base.py", line 28, in render_block_to_string
   t = loader.select_template(template_name)
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/django/template/loader.py", line 42, in select_template
   return engine.get_template(template_name)
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/django/template/backends/django.py", line 34, in get_template
   return Template(self.engine.get_template(template_name), self)
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/django/template/engine.py", line 143, in get_template
   template, origin = self.find_template(template_name)
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/django/template/engine.py", line 125, in find_template
   template = loader.get_template(name, skip=skip)
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/django/template/loaders/cached.py", line 58, in get_template
   template = super().get_template(template_name, skip)
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/django/template/loaders/base.py", line 29, in get_template
   return Template(
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/django/template/base.py", line 155, in __init__
   self.nodelist = self.compile_nodelist()
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/django/template/base.py", line 193, in compile_nodelist
   return parser.parse()
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/django/template/base.py", line 479, in parse
   self.extend_nodelist(nodelist, compiled_result, token)
 File "/srv/aleksis/envs/production/lib/python3.9/site-packages/django/template/base.py", line 496, in extend_nodelist
   raise self.error(

Exception Type: TemplateSyntaxError at /person/3033/edit/
Exception Value: must be the first tag in the template.
Request information:
USER: ***

GET: No GET data

POST:
csrfmiddlewaretoken = '96GKudGqTKp33vsxnLFPP6BVoZJCARx6uOFLHeJ4g4H73yVAXpVYXtUX2SfLyTQO'

FILES:
avatar =

assigned to @hansegucker

assigned to @hansegucker

changed the description

changed title from Fwd: [Django] ERROR (EXTERNAL IP): Internal Server Error: /person/3033/edit/ [Ticket#751089] to extends must be the first tag in the template. [Ticket#751089]

added part::backend type::bug labels

made the issue visible to everyone

created merge request !960 (merged) to address this issue

mentioned in merge request !960 (merged)

closed with merge request !960 (merged)

mentioned in commit 4b4aa59c