Dataset preview not working

[kumarvivek1752]

Dataset preview is not currently working. I'm using CKAN 2.9.6, and I've tried all versions, but none of them are working. I installed CKAN using Docker

here is my logs

Traceback (most recent call last):
  File "/usr/lib/python3.8/site-packages/flask/app.py", line 2449, in wsgi_app
    response = self.handle_exception(e)
  File "/usr/lib/python3.8/site-packages/flask/app.py", line 1866, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/usr/lib/python3.8/site-packages/flask/_compat.py", line 39, in reraise
    raise value
  File "/usr/lib/python3.8/site-packages/flask/app.py", line 2446, in wsgi_app
    response = self.full_dispatch_request()
  File "/usr/lib/python3.8/site-packages/flask/app.py", line 1951, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/usr/lib/python3.8/site-packages/flask/app.py", line 1820, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/usr/lib/python3.8/site-packages/flask/_compat.py", line 39, in reraise
    raise value
  File "/usr/lib/python3.8/site-packages/flask/app.py", line 1949, in full_dispatch_request
    rv = self.dispatch_request()
  File "/usr/lib/python3.8/site-packages/flask_debugtoolbar/__init__.py", line 125, in dispatch_request
    return view_func(**req.view_args)
  File "/srv/app/src/ckan/ckan/views/resource.py", line 151, in read
    return base.render(template, extra_vars)
  File "/srv/app/src/ckan/ckan/lib/base.py", line 151, in render
    return flask_render_template(template_name, **extra_vars)
  File "/usr/lib/python3.8/site-packages/flask/templating.py", line 137, in render_template
    return _render(
  File "/usr/lib/python3.8/site-packages/flask/templating.py", line 120, in _render
    rv = template.render(context)
  File "/usr/lib/python3.8/site-packages/jinja2/asyncsupport.py", line 76, in render
    return original_render(self, *args, **kwargs)
  File "/usr/lib/python3.8/site-packages/jinja2/environment.py", line 1008, in render
    return self.environment.handle_exception(exc_info, True)
  File "/usr/lib/python3.8/site-packages/jinja2/environment.py", line 780, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/usr/lib/python3.8/site-packages/jinja2/_compat.py", line 37, in reraise
    raise value.with_traceback(tb)
  File "/srv/app/src_extensions/ckanext-ontario_theme/ckanext/ontario_theme/templates/internal/scheming/package/resource_read.html", line 14, in <module>
    {% set is_admin = h.check_access('package_update', {'id':pkg.id }) %}
  File "/srv/app/src/ckan/ckanext/datastore/templates/package/resource_read.html", line 1, in <module>
    {% ckan_extends %}
  File "/srv/app/src_extensions/ckanext-ontario_theme/ckanext/ontario_theme/templates/internal/package/resource_read.html", line 1, in <module>
    {% ckan_extends %}
  File "/srv/app/src/ckan/ckan/templates/package/resource_read.html", line 3, in <module>
    {% set res = resource %}
  File "/srv/app/src_extensions/ckanext-ontario_theme/ckanext/ontario_theme/templates/internal/package/base.html", line 1, in <module>
    {% ckan_extends %}
  File "/srv/app/src/ckan/ckan/templates/package/base.html", line 4, in <module>
    {% set dataset_type = dataset_type or pkg.type or 'dataset' %}
  File "/srv/app/src_extensions/ckanext-ontario_theme/ckanext/ontario_theme/templates/internal/page.html", line 1, in <module>
    {% ckan_extends %}
  File "/srv/app/src/ckan/ckan/templates/page.html", line 1, in <module>
    {% extends "base.html" %}
  File "/srv/app/src_extensions/ckanext-ontario_theme/ckanext/ontario_theme/templates/internal/base.html", line 1, in <module>
    {% ckan_extends %}
  File "/srv/app/src_extensions/ckanext-harvest/ckanext/harvest/templates/base.html", line 1, in <module>
    {% ckan_extends %}
  File "/srv/app/src_extensions/ckanext-scheming/ckanext/scheming/templates/base.html", line 1, in <module>
    {% ckan_extends %}
  File "/srv/app/src/ckan/ckan/templates/base.html", line 105, in <module>
    {%- block page %}{% endblock -%}
  File "/srv/app/src/ckan/ckan/templates/page.html", line 19, in <module>
    {%- block content %}
  File "/srv/app/src_extensions/ckanext-ontario_theme/ckanext/ontario_theme/templates/internal/page.html", line 13, in <module>
    {% block main_content %}
  File "/srv/app/src_extensions/ckanext-ontario_theme/ckanext/ontario_theme/templates/internal/page.html", line 51, in <module>
    {% block primary %}
  File "/srv/app/src_extensions/ckanext-ontario_theme/ckanext/ontario_theme/templates/internal/scheming/package/resource_read.html", line 192, in <module>
    {% block primary_content %}
  File "/srv/app/src_extensions/ckanext-ontario_theme/ckanext/ontario_theme/templates/internal/scheming/package/resource_read.html", line 193, in <module>
    {% block resource_additional_information %}
  File "/srv/app/src_extensions/ckanext-ontario_theme/ckanext/ontario_theme/templates/internal/scheming/package/resource_read.html", line 195, in <module>
    {% block resource_additional_information_inner %}
  File "/srv/app/src_extensions/ckanext-ontario_theme/ckanext/ontario_theme/templates/internal/scheming/package/resource_read.html", line 236, in <module>
    {%- block resource_license -%}
  File "/srv/app/src_extensions/ckanext-ontario_theme/ckanext/ontario_theme/templates/internal/scheming/package/resource_read.html", line 240, in <module>
    <td>{{ h.get_translated(license, 'title') }}</td>
  File "/srv/app/src/ckan/ckan/lib/helpers.py", line 2807, in get_translated
    return data_dict[field + u'_translated'][language]
TypeError: 'NoneType' object is not subscriptable