Error accessing document indexing API

From the forum: https://forum.mayan-edms.com/viewtopic.php?t=3982

I have a brand new installation of Mayan using the stable image and for some reason I can't access the API. I restarted the container multiple times but the issue persists. Here's the latest logging:

  
  File "/opt/mayan-edms/lib/python3.7/site-packages/mayan/apps/document_indexing/api_views.py", line 181, in get_index_template
  klass=queryset, pk=self.kwargs['index_template_id']
  KeyError: 'index_template_id'