I'm not sure if this is the same bug. I get following in the logs:
``` Traceback (most recent call last): File "/usr/lib/python2.7/dist- packages/django/core/handlers/exception.py", line 41, in inner response = get_response(request) File "/usr/lib/python2.7/dist-packages/django/core/handlers/base.py", line 249, in _legacy_get_response response = self._get_response(request) File "/usr/lib/python2.7/dist-packages/django/core/handlers/base.py", line 187, in _get_response response = self.process_exception_by_middleware(e, request) File "/usr/lib/python2.7/dist-packages/django/core/handlers/base.py", line 185, in _get_response response = wrapped_callback(request, *callback_args, **callback_kwargs) File "/usr/lib/python2.7/dist-packages/django/views/generic/base.py", line 68, in view return self.dispatch(request, *args, **kwargs) File "/usr/lib/python2.7/dist-packages/django/utils/decorators.py", line 67, in _wrapper return bound_func(*args, **kwargs) File "/usr/lib/python2.7/dist- packages/django/views/decorators/debug.py", line 76, in sensitive_post_parameters_wrapper return view(request, *args, **kwargs) File "/usr/lib/python2.7/dist-packages/django/utils/decorators.py", line 63, in bound_func return func.__get__(self, type(self))(*args2, **kwargs2) File "/usr/lib/python2.7/dist-packages/allauth/account/views.py", line 137, in dispatch return super(LoginView, self).dispatch(request, *args, **kwargs) File "/usr/lib/python2.7/dist-packages/allauth/account/views.py", line 80, in dispatch **kwargs) File "/usr/lib/python2.7/dist-packages/django/views/generic/base.py", line 88, in dispatch return handler(request, *args, **kwargs) File "/usr/lib/python2.7/dist-packages/allauth/account/views.py", line 103, in post response = self.form_valid(form) File "/usr/lib/python2.7/dist-packages/allauth/account/views.py", line 150, in form_valid return form.login(self.request, redirect_url=success_url) File "/usr/lib/python2.7/dist-packages/allauth/account/forms.py", line 197, in login redirect_url=redirect_url) File "/usr/lib/python2.7/dist-packages/allauth/account/utils.py", line 146, in perform_login send_email_confirmation(request, user, signup=signup) File "/usr/lib/python2.7/dist-packages/allauth/account/utils.py", line 323, in send_email_confirmation confirm=True) File "/usr/lib/python2.7/dist-packages/allauth/account/managers.py", line 15, in add_email user=user, email__iexact=email, defaults={"email": email} File "/usr/lib/python2.7/dist-packages/django/db/models/manager.py", line 85, in manager_method return getattr(self.get_queryset(), name)(*args, **kwargs) File "/usr/lib/python2.7/dist-packages/django/db/models/query.py", line 466, in get_or_create return self._create_object_from_params(lookup, params) File "/usr/lib/python2.7/dist-packages/django/db/models/query.py", line 498, in _create_object_from_params obj = self.create(**params) File "/usr/lib/python2.7/dist-packages/django/db/models/query.py", line 394, in create obj.save(force_insert=True, using=self.db) File "/usr/lib/python2.7/dist-packages/django/db/models/base.py", line 808, in save force_update=force_update, update_fields=update_fields) File "/usr/lib/python2.7/dist-packages/django/db/models/base.py", line 838, in save_base updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields) File "/usr/lib/python2.7/dist-packages/django/db/models/base.py", line 924, in _save_table result = self._do_insert(cls._base_manager, using, fields, update_pk, raw) File "/usr/lib/python2.7/dist-packages/django/db/models/base.py", line 963, in _do_insert using=using, raw=raw) File "/usr/lib/python2.7/dist-packages/django/db/models/manager.py", line 85, in manager_method return getattr(self.get_queryset(), name)(*args, **kwargs) File "/usr/lib/python2.7/dist-packages/django/db/models/query.py", line 1076, in _insert return query.get_compiler(using=using).execute_sql(return_id) File "/usr/lib/python2.7/dist- packages/django/db/models/sql/compiler.py", line 1112, in execute_sql cursor.execute(sql, params) File "/usr/lib/python2.7/dist-packages/django/db/backends/utils.py", line 64, in execute return self.cursor.execute(sql, params) File "/usr/lib/python2.7/dist-packages/django/db/utils.py", line 94, in __exit__ six.reraise(dj_exc_type, dj_exc_value, traceback) File "/usr/lib/python2.7/dist-packages/django/db/backends/utils.py", line 64, in execute return self.cursor.execute(sql, params) File "/usr/lib/python2.7/dist- packages/django/db/backends/sqlite3/base.py", line 328, in execute return Database.Cursor.execute(self, query, params) OperationalError: attempt to write a readonly database ``` after changing the owner of the database the error disappears: chown www-data:www-data /var/lib/mailman3/web/mailman3suite.db.db as a sidenote: there are 2 .db files in that directory: /var/lib/mailman3/web/ 0 -rw-r----- 1 www-data www-data 0 Mar 1 19:25 mailman3suite.db 476 -rw-r--r-- 1 root root 487424 Mar 1 20:00 mailman3suite.db.db mailman 3.1.1 stretch-backports fresh install an new machine