Failed to retrieve data from Discovery Service for course

In Ecommerce checkout page,getting error Failed to retrieve data from Discovery Service for course

@BanuSoppan To allow others to help you with this, you would need to post more details – could you post the logs, and especially the errors you can get there? What actions were you doing exactly? And how did you configure the service?

When i go to ecommerce checkout page ,I am getting error
ecommerce log:
Feb 2 07:28:50 ip-172-31-27-121 [service_variant=ecommerce][ecommerce.extensions.basket.views] ERROR [ip-172-31-27-121 19719] [/edx/app/ecommerce/ecommerce/ecommerce/extensions/basket/views.py:287] - Failed to retrieve data from Discovery Service for course [course-v1:SLTC+CS202101+2021_NODE].
Traceback (most recent call last):
File “/edx/app/ecommerce/ecommerce/ecommerce/extensions/basket/views.py”, line 269, in _get_course_data
course = get_course_info_from_catalog(self.request.site, product)
File “/edx/app/ecommerce/ecommerce/ecommerce/courses/utils.py”, line 47, in get_course_info_from_catalog
course = api.course_runs(key).get(partner=partner_short_code)
File “/edx/app/ecommerce/venvs/ecommerce/lib/python3.5/site-packages/slumber/init.py”, line 155, in get
resp = self._request(“GET”, params=kwargs)
File “/edx/app/ecommerce/venvs/ecommerce/lib/python3.5/site-packages/slumber/init.py”, line 101, in _request
raise exception_class(“Client Error %s: %s” % (resp.status_code, url), response=resp, content=resp.content)