OK
thanks for the advice.
I started installing following the path ...
the first error I hit is:
```
(venv) mailman@arda:/etc/mailman3$ mailman-web migrate
Traceback (most recent call last):
File
"/opt/mailman/venv/lib/python3.9/site-packages/django/template/utils.py", line
66, in __getitem__
return self._engines[alias]
KeyError: 'django'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File
"/opt/mailman/venv/lib/python3.9/site-packages/django/template/backends/django.py",
line 121, in get_package_libraries
module = import_module(entry[1])
File "/usr/lib/python3.9/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 790, in exec_module
File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
File
"/opt/mailman/venv/lib/python3.9/site-packages/hyperkitty/templatetags/decorate.py",
line 4, in <module>
from hyperkitty.lib.renderer import markdown_renderer, text_renderer
File
"/opt/mailman/venv/lib/python3.9/site-packages/hyperkitty/lib/renderer.py",
line 6, in <module>
from mistune.plugins.extra import plugin_url
ModuleNotFoundError: No module named 'mistune.plugins.extra'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/opt/mailman/venv/bin/mailman-web", line 8, in <module>
sys.exit(main())
File "/opt/mailman/venv/lib/python3.9/site-packages/mailman_web/manage.py",
line 30, in main
execute_from_command_line(sys.argv)
File
"/opt/mailman/venv/lib/python3.9/site-packages/django/core/management/__init__.py",
line 401, in execute_from_command_line
utility.execute()
File
"/opt/mailman/venv/lib/python3.9/site-packages/django/core/management/__init__.py",
line 395, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File
"/opt/mailman/venv/lib/python3.9/site-packages/django/core/management/base.py",
line 328, in run_from_argv
self.execute(*args, **cmd_options)
File
"/opt/mailman/venv/lib/python3.9/site-packages/django/core/management/base.py",
line 366, in execute
self.check()
File
"/opt/mailman/venv/lib/python3.9/site-packages/django/core/management/base.py",
line 392, in check
all_issues = self._run_checks(
File
"/opt/mailman/venv/lib/python3.9/site-packages/django/core/management/commands/migrate.py",
line 64, in _run_checks
issues.extend(super()._run_checks(**kwargs))
File
"/opt/mailman/venv/lib/python3.9/site-packages/django/core/management/base.py",
line 382, in _run_checks
return checks.run_checks(**kwargs)
File
"/opt/mailman/venv/lib/python3.9/site-packages/django/core/checks/registry.py",
line 72, in run_checks
new_errors = check(app_configs=app_configs)
File
"/opt/mailman/venv/lib/python3.9/site-packages/django/contrib/admin/checks.py",
line 76, in check_dependencies
for engine in engines.all():
File
"/opt/mailman/venv/lib/python3.9/site-packages/django/template/utils.py", line
90, in all
return [self[alias] for alias in self]
File
"/opt/mailman/venv/lib/python3.9/site-packages/django/template/utils.py", line
90, in <listcomp>
return [self[alias] for alias in self]
File
"/opt/mailman/venv/lib/python3.9/site-packages/django/template/utils.py", line
81, in __getitem__
engine = engine_cls(params)
File
"/opt/mailman/venv/lib/python3.9/site-packages/django/template/backends/django.py",
line 25, in __init__
options['libraries'] = self.get_templatetag_libraries(libraries)
File
"/opt/mailman/venv/lib/python3.9/site-packages/django/template/backends/django.py",
line 43, in get_templatetag_libraries
libraries = get_installed_libraries()
File
"/opt/mailman/venv/lib/python3.9/site-packages/django/template/backends/django.py",
line 108, in get_installed_libraries
for name in get_package_libraries(pkg):
File
"/opt/mailman/venv/lib/python3.9/site-packages/django/template/backends/django.py",
line 123, in get_package_libraries
raise InvalidTemplateLibrary(
django.template.library.InvalidTemplateLibrary: Invalid template library
specified. ImportError raised when trying to load
'hyperkitty.templatetags.decorate': No module named 'mistune.plugins.extra'
```
```
(venv) mailman@arda:/etc/mailman3$ pip install mistune
Requirement already satisfied: mistune in
/opt/mailman/venv/lib/python3.9/site-packages (3.0.0rc1)
```
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