Helper 'get_contact_form_template_url' has not been defined

[ericariyanto]

Description
I use CKAN 2.10 docker, when I try to put html link in package/read.html I found some error,

• when I put : {% resource 'ckanext-contact/main' %}, error message is : Encountered unknown tag 'resource'
• when I remove resource, error message is : Helper 'get_contact_form_template_url' has not been defined

Expected Behaviour
button show like example

To Reproduce

• install docker ckan : https://github.com/ckan/ckan-docker
• install ckanext-contact on ckan/Dockerfile.dev
• edit file package/read.html, add html ckanext-contact button

Error Log
Paste any relevant error logs below:

2023-05-07 12:42:54 Traceback (most recent call last):
2023-05-07 12:42:54   File "/usr/lib/python3.10/site-packages/flask/app.py", line 2076, in wsgi_app
2023-05-07 12:42:54     response = self.handle_exception(e)
2023-05-07 12:42:54   File "/usr/lib/python3.10/site-packages/flask/app.py", line 2073, in wsgi_app
2023-05-07 12:42:54     response = self.full_dispatch_request()
2023-05-07 12:42:54   File "/usr/lib/python3.10/site-packages/flask/app.py", line 1518, in full_dispatch_request
2023-05-07 12:42:54     rv = self.handle_user_exception(e)
2023-05-07 12:42:54   File "/usr/lib/python3.10/site-packages/flask/app.py", line 1516, in full_dispatch_request
2023-05-07 12:42:54     rv = self.dispatch_request()
2023-05-07 12:42:54   File "/usr/lib/python3.10/site-packages/flask_debugtoolbar/__init__.py", line 142, in dispatch_request
2023-05-07 12:42:54     return view_func(**req.view_args)
2023-05-07 12:42:54   File "/srv/app/src/ckan/ckan/views/dataset.py", line 499, in read
2023-05-07 12:42:54     return base.render(
2023-05-07 12:42:54   File "/srv/app/src/ckan/ckan/lib/base.py", line 107, in render
2023-05-07 12:42:54     return flask_render_template(template_name, **extra_vars)
2023-05-07 12:42:54   File "/usr/lib/python3.10/site-packages/flask/templating.py", line 147, in render_template
2023-05-07 12:42:54     return _render(
2023-05-07 12:42:54   File "/usr/lib/python3.10/site-packages/flask/templating.py", line 128, in _render
2023-05-07 12:42:54     rv = template.render(context)
2023-05-07 12:42:54   File "/usr/lib/python3.10/site-packages/jinja2/environment.py", line 1301, in render
2023-05-07 12:42:54     self.environment.handle_exception()
2023-05-07 12:42:54   File "/usr/lib/python3.10/site-packages/jinja2/environment.py", line 936, in handle_exception
2023-05-07 12:42:54     raise rewrite_traceback_stack(source=source)
2023-05-07 12:42:54   File "/srv/app/src_extensions/ckanext-pstheme/ckanext/pstheme/templates/package/read.html", line 1, in top-level template code
2023-05-07 12:42:54     {% ckan_extends %}
2023-05-07 12:42:54   File "/srv/app/src/ckan/ckan/templates/package/read.html", line 1, in top-level template code
2023-05-07 12:42:54     {% extends "package/read_base.html" %}
2023-05-07 12:42:54   File "/srv/app/src/ckan/ckan/templates/package/read_base.html", line 3, in top-level template code
2023-05-07 12:42:54     {% set default_group_type = h.default_group_type('group') %}
2023-05-07 12:42:54   File "/srv/app/src/ckan/ckan/templates/package/base.html", line 4, in top-level template code
2023-05-07 12:42:54     {% set dataset_type = dataset_type or pkg.type or 'dataset' %}
2023-05-07 12:42:54   File "/srv/app/src/ckan/ckan/templates/page.html", line 1, in top-level template code
2023-05-07 12:42:54     {% extends "base.html" %}
2023-05-07 12:42:54   File "/srv/app/src_extensions/ckanext-pstheme/ckanext/pstheme/templates/base.html", line 1, in top-level template code
2023-05-07 12:42:54     {% ckan_extends %}
2023-05-07 12:42:54   File "/srv/app/src/ckanext-scheming/ckanext/scheming/templates/base.html", line 1, in top-level template code
2023-05-07 12:42:54     {% ckan_extends %}
2023-05-07 12:42:54   File "/srv/app/src/ckan/ckan/templates/base.html", line 108, in top-level template code
2023-05-07 12:42:54     {%- block page %}{% endblock -%}
2023-05-07 12:42:54   File "/srv/app/src/ckan/ckan/templates/page.html", line 19, in block 'page'
2023-05-07 12:42:54     {%- block content %}
2023-05-07 12:42:54   File "/srv/app/src/ckan/ckan/templates/page.html", line 22, in block 'content'
2023-05-07 12:42:54     {% block main_content %}
2023-05-07 12:42:54   File "/srv/app/src/ckan/ckan/templates/page.html", line 74, in block 'main_content'
2023-05-07 12:42:54     {% block primary %}
2023-05-07 12:42:54   File "/srv/app/src/ckan/ckan/templates/page.html", line 87, in block 'primary'
2023-05-07 12:42:54     {% block primary_content %}
2023-05-07 12:42:54   File "/srv/app/src/ckan/ckan/templates/page.html", line 107, in block 'primary_content'
2023-05-07 12:42:54     {% block primary_content_inner %}
2023-05-07 12:42:54   File "/srv/app/src_extensions/ckanext-pstheme/ckanext/pstheme/templates/package/read.html", line 9, in block 'primary_content_inner'
2023-05-07 12:42:54     data-module-template="{{ h.get_contact_form_template_url(params) }}"
2023-05-07 12:42:54   File "/usr/lib/python3.10/site-packages/jinja2/environment.py", line 489, in getattr
2023-05-07 12:42:54     return obj[attribute]
2023-05-07 12:42:54   File "/srv/app/src/ckan/ckan/lib/helpers.py", line 116, in __missing__
2023-05-07 12:42:54     raise ckan.exceptions.HelperError(
2023-05-07 12:42:54 ckan.exceptions.HelperError: Helper 'get_contact_form_template_url' has not been defined.

Screenshots
Add screenshots to illustrate the bug if you want.

Your Setup

• CKAN version: 2.10.0