# Error raises when i try to override certificates list handler **URL:** \ **Category:** Development\ **Tags:** how-to, tutor\ **Created:** [July 26, 2022, 7:24am UTC](https://discuss.openedx.org/t/error-raises-when-i-try-to-override-certificates-list-handler/7918 "2022-07-26T07:24:30Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![crtmneric](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.openedx.org/crtmneric/32/4018_2.png) [@crtmneric](https://discuss.openedx.org/u/crtmneric)\ **Post date:** [July 26, 2022, 7:24am UTC](https://discuss.openedx.org/t/error-raises-when-i-try-to-override-certificates-list-handler/7918/1 "2022-07-26T07:24:30Z")
Hi there, We are really new to develop & customize openedx platform. Also we are using lilac 5 fork. When i try to override certificates\_list\_handler method from custom djangoapp and just import it like ; from cms.djangoapps.contentstore.views.certificates import certificates\_list\_handler it always raises ```auto lms-worker_1 | RuntimeError: Model class cms.djangoapps.xblock_config.models.StudioConfig doesn't declare an explicit app_label and isn't in an application in INSTALLED_APPS. lms-worker_1 | Traceback (most recent call last): lms-worker_1 | File "/openedx/venv/bin/celery", line 8, in lms-worker_1 | sys.exit(main()) lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/celery/ __main__.py", line 16, in main lms-worker_1 | _main() lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/celery/bin/celery.py", line 322, in main lms-worker_1 | cmd.execute_from_commandline(argv) lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/celery/bin/celery.py", line 499, in execute_from_commandline lms-worker_1 | super(CeleryCommand, self).execute_from_commandline(argv))) lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/celery/bin/base.py", line 305, in execute_from_commandline lms-worker_1 | return self.handle_argv(self.prog_name, argv[1:]) lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/celery/bin/celery.py", line 491, in handle_argv lms-worker_1 | return self.execute(command, argv) lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/celery/bin/celery.py", line 415, in execute lms-worker_1 | return cls( lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/celery/bin/worker.py", line 223, in run_from_argv lms-worker_1 | return self(*args, **options) lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/celery/bin/base.py", line 253, in __call__ lms-worker_1 | ret = self.run(*args, **kwargs) lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/celery/bin/worker.py", line 253, in run lms-worker_1 | worker = self.app.Worker( lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/celery/worker/worker.py", line 99, in __init__ lms-worker_1 | self.app.loader.init_worker() lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/celery/loaders/base.py", line 114, in init_worker lms-worker_1 | self.import_default_modules() lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/celery/loaders/base.py", line 108, in import_default_modules lms-worker_1 | raise response lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/celery/utils/dispatch/signal.py", line 288, in send lms-worker_1 | response = receiver(signal=self, sender=sender, **named) lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/celery/fixups/django.py", line 84, in on_import_modules lms-worker_1 | self.worker_fixup.validate_models() lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/celery/fixups/django.py", line 123, in validate_models lms-worker_1 | run_checks() lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/django/core/checks/registry.py", line 72, in run_checks lms-worker_1 | new_errors = check(app_configs=app_configs) lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/django/core/checks/urls.py", line 13, in check_url_config lms-worker_1 | return check_resolver(resolver) lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/django/core/checks/urls.py", line 23, in check_resolver lms-worker_1 | return check_method() lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/django/urls/resolvers.py", line 399, in check lms-worker_1 | for pattern in self.url_patterns: lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/django/utils/functional.py", line 80, in __get__ lms-worker_1 | res = instance. __dict__ [self.name] = self.func(instance) lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/django/urls/resolvers.py", line 584, in url_patterns lms-worker_1 | patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module) lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/django/utils/functional.py", line 80, in __get__ lms-worker_1 | res = instance. __dict__ [self.name] = self.func(instance) lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/django/urls/resolvers.py", line 577, in urlconf_module lms-worker_1 | return import_module(self.urlconf_name) lms-worker_1 | File "/opt/pyenv/versions/3.8.6/lib/python3.8/importlib/ __init__.py", line 127, in import_module lms-worker_1 | return _bootstrap._gcd_import(name[level:], package, level) lms-worker_1 | File "", line 1014, in _gcd_import lms-worker_1 | File "", line 991, in _find_and_load lms-worker_1 | File "", line 975, in _find_and_load_unlocked lms-worker_1 | File "", line 671, in _load_unlocked lms-worker_1 | File "", line 783, in exec_module lms-worker_1 | File "", line 219, in _call_with_frames_removed lms-worker_1 | File "/openedx/edx-platform/lms/urls.py", line 990, in lms-worker_1 | urlpatterns.extend(get_plugin_url_patterns(ProjectType.LMS)) lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/edx_django_utils/plugins/plugin_urls.py", line 34, in get_plugin_url_patterns lms-worker_1 | return [ lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/edx_django_utils/plugins/plugin_urls.py", line 35, in lms-worker_1 | _get_url(url_module_path, url_config) lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/edx_django_utils/plugins/plugin_urls.py", line 26, in _get_url lms-worker_1 | return url(regex, include(url_module_path)) lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/django/urls/conf.py", line 34, in include lms-worker_1 | urlconf_module = import_module(urlconf_module) lms-worker_1 | File "/opt/pyenv/versions/3.8.6/lib/python3.8/importlib/ __init__.py", line 127, in import_module lms-worker_1 | return _bootstrap._gcd_import(name[level:], package, level) lms-worker_1 | File "", line 1014, in _gcd_import lms-worker_1 | File "", line 991, in _find_and_load lms-worker_1 | File "", line 975, in _find_and_load_unlocked lms-worker_1 | File "", line 671, in _load_unlocked lms-worker_1 | File "", line 783, in exec_module lms-worker_1 | File "", line 219, in _call_with_frames_removed lms-worker_1 | File "/openedx/requirements/softtechtabs/softtechtabs/urls.py", line 7, in lms-worker_1 | from . import views lms-worker_1 | File "/openedx/requirements/softtechtabs/softtechtabs/views.py", line 20, in lms-worker_1 | from cms.djangoapps.contentstore.views.certificates import certificates_list_handler lms-worker_1 | File "/openedx/edx-platform/cms/djangoapps/contentstore/views/ __init__.py", line 5, in lms-worker_1 | from .component import * lms-worker_1 | File "/openedx/edx-platform/cms/djangoapps/contentstore/views/component.py", line 33, in lms-worker_1 | from .item import StudioEditModuleRuntime, add_container_page_publishing_info, create_xblock_info lms-worker_1 | File "/openedx/edx-platform/cms/djangoapps/contentstore/views/item.py", line 32, in lms-worker_1 | from cms.djangoapps.xblock_config.models import CourseEditLTIFieldsEnabledFlag lms-worker_1 | File "/openedx/edx-platform/cms/djangoapps/xblock_config/models.py", line 15, in lms-worker_1 | class StudioConfig(ConfigurationModel): lms-worker_1 | File "/openedx/venv/lib/python3.8/site-packages/django/db/models/base.py", line 108, in __new__ lms-worker_1 | raise RuntimeError( lms-worker_1 | RuntimeError: Model class cms.djangoapps.xblock_config.models.StudioConfig doesn't declare an explicit app_label and isn't in an application in INSTALLED_APPS. tutor_local_lms-worker_1 exited with code 1 S ``` Is there any alternatives to send custom data to certificates or fix this error ? ☹ Thank you for any help.