Page not found: Course Card learn more button

Hi everyone, when i click on the learn more button on my course cards i’m getting a page not found error. what might be the problem?

thanks in advance

Try this : Learner is not able to see course

l;m getting this in my lms log

Sep 15 02:30:04 terry [service_variant=lms][py.warnings][env:sandbox] WARNING [terry 16254] [paginator.py:119] - /edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/rest_framework/pagination.py:208: UnorderedObjectListWarning: Pagination may yield inconsistent results with an unordered object_list: <class ‘django.contrib.auth.models.User’> QuerySet.
paginator = self.django_paginator_class(queryset, page_size)