make sure when defining the course namespace in the replace url methods that we explicitly state the parameter name. There are some optional parameters and if we don't define the parameter name, it'll end put being interpreted as a different parameter

common/djangoapps/static_replace.py

@@ -60,6 +60,7 @@ def replace(static_url, prefix=None, course_namespace=None):
 
 
 def replace_urls(text, staticfiles_prefix=None, replace_prefix='/static/', course_namespace=None):
+
     def replace_url(static_url):
         return replace(static_url, staticfiles_prefix, course_namespace = course_namespace)
 

common/lib/xmodule/xmodule/capa_module.py

@@ -347,7 +347,7 @@ class CapaModule(XModule):
                 id=self.location.html_id(), ajax_url=self.system.ajax_url) + html + "</div>"
 
         # now do the substitutions which are filesystem based, e.g. '/static/' prefixes
-        return self.system.replace_urls(html, self.metadata['data_dir'], self.location)
+        return self.system.replace_urls(html, self.metadata['data_dir'], course_namespace=self.location)
 
     def handle_ajax(self, dispatch, get):
         '''
@@ -451,7 +451,7 @@ class CapaModule(XModule):
         new_answers = dict()
         for answer_id in answers:
             try:
-                new_answer = {answer_id: self.system.replace_urls(answers[answer_id], self.metadata['data_dir'], self.location)}
+                new_answer = {answer_id: self.system.replace_urls(answers[answer_id], self.metadata['data_dir'], course_namespace=self.location)}
             except TypeError:
                 log.debug('Unable to perform URL substitution on answers[%s]: %s' % (answer_id, answers[answer_id]))
                 new_answer = {answer_id: answers[answer_id]}

lms/djangoapps/courseware/courses.py

@@ -220,7 +220,7 @@ def get_course_syllabus_section(course, section_key):
             filepath = find_file(fs, dirs, section_key + ".html")
             with fs.open(filepath) as htmlFile:
                 return replace_urls(htmlFile.read().decode('utf-8'),
-                                    course.metadata['data_dir'], course.location)
+                                    course.metadata['data_dir'], course_namespace=course.location)
         except ResourceNotFoundError:
             log.exception("Missing syllabus section {key} in course {url}".format(
                 key=section_key, url=course.location.url()))