Problem with CKAN 2.10.1

[grzegorzb1990]

Hi, I am trying to install comments on a fresh instance of ckan. When trying to create a comment via the web the request ends with a 500 status .

error log:

2023-09-08 18:09:41,986 ERROR [ckan.views.api] 'NoneType' object has no attribute 'replace'
Traceback (most recent call last):
  File "/usr/lib/ckan/default/lib/python3.8/site-packages/ckanext/comments/logic/action.py", line 131, in comment_create
    thread_dict = tk.get_action("comments_thread_show")(context.copy(), thread_data)
  File "/usr/lib/ckan/default/src/ckan/ckan/logic/__init__.py", line 551, in wrapped
    result = _action(context, data_dict, **kw)
  File "/usr/lib/ckan/default/src/ckan/ckan/logic/__init__.py", line 652, in wrapper
    return action(context, data_dict)
  File "/usr/lib/ckan/default/lib/python3.8/site-packages/ckanext/comments/logic/action.py", line 78, in thread_show
    raise tk.ObjectNotFound("Thread not found")
ckan.logic.NotFound: Thread not found

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/ckan/default/src/ckan/ckan/config/middleware/../../views/api.py", line 283, in action
    result = function(context, request_data)
  File "/usr/lib/ckan/default/src/ckan/ckan/logic/__init__.py", line 551, in wrapped
    result = _action(context, data_dict, **kw)
  File "/usr/lib/ckan/default/src/ckan/ckan/logic/__init__.py", line 652, in wrapper
    return action(context, data_dict)
  File "/usr/lib/ckan/default/lib/python3.8/site-packages/ckanext/comments/logic/action.py", line 135, in comment_create
    thread_dict = tk.get_action("comments_thread_create")(
  File "/usr/lib/ckan/default/src/ckan/ckan/logic/__init__.py", line 551, in wrapped
    result = _action(context, data_dict, **kw)
  File "/usr/lib/ckan/default/src/ckan/ckan/logic/__init__.py", line 652, in wrapper
    return action(context, data_dict)
  File "/usr/lib/ckan/default/lib/python3.8/site-packages/ckanext/comments/logic/action.py", line 45, in thread_create
    subject = thread.get_subject()
  File "/usr/lib/ckan/default/lib/python3.8/site-packages/ckanext/comments/model/thread.py", line 52, in get_subject
    getter = import_string(
  File "/usr/lib/ckan/default/lib/python3.8/site-packages/werkzeug/utils.py", line 868, in import_string
    import_name = import_name.replace(":", ".")
AttributeError: 'NoneType' object has no attribute 'replace'

ckan details:
{"help": "http://127.0.0.1/api/3/action/help_show?name=status_show", "success": true, "result": {"site_title": "CKAN", "site_description": "", "site_url": "http://127.0.0.1", "error_emails_to": "", "locale_default": "en", "extensions": ["activity", "recline_map_view", "image_view", "text_view", "recline_grid_view", "recline_view", "resource_proxy", "geo_view", "geojson_view", "comments"], "ckan_version": "2.10.1"}}

plugin version:
pip install ckanext-commentsr/lib/ckan/default/src/ckan/ckan/templates/package$
Requirement already satisfied: ckanext-comments in /usr/lib/ckan/default/lib/python3.8/site-packages (0.3.0)

[grzegorzb1990]

Downgrading to version 0.2.0 of the plugin helped