Projects comparison is not working

[acs]

Trying to compare projects in:

http://prospector.bitergia.net/project/+compare/1,3

it is not working. In the logs I can see:

  File "/root/prospector_venv/lib/python3.5/site-packages/django/template/base.py", line 565, in invalid_block_tag
    get_text_list(["'%s'" % p for p in parse_until], 'or'),
django.template.exceptions.TemplateSyntaxError: Invalid block tag on line 8: 'static', expected 'endblock'. Did you forget to register or load this tag?