IndexError: list index out of range.

::ffff:192.168.1.97 - - [09/Mar/2015 15:04:53] "GET /api/client.json/billyates HTTP/1.1" 500 -
Traceback (most recent call last):
  File "/var/spool/burp/lib/python2.7/site-packages/flask/app.py", line 1836, in __call__
    return self.wsgi_app(environ, start_response)
  File "/var/spool/burp/lib/python2.7/site-packages/flask/app.py", line 1820, in wsgi_app
    response = self.make_response(self.handle_exception(e))
  File "/var/spool/burp/lib/python2.7/site-packages/flask/app.py", line 1403, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/var/spool/burp/lib/python2.7/site-packages/flask/app.py", line 1817, in wsgi_app
    response = self.full_dispatch_request()
  File "/var/spool/burp/lib/python2.7/site-packages/flask/app.py", line 1477, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/var/spool/burp/lib/python2.7/site-packages/flask/app.py", line 1381, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/var/spool/burp/lib/python2.7/site-packages/flask/app.py", line 1475, in full_dispatch_request
    rv = self.dispatch_request()
  File "/var/spool/burp/lib/python2.7/site-packages/flask/app.py", line 1461, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/var/spool/burp/lib/python2.7/site-packages/flask_login.py", line 758, in decorated_view
    return func(*args, **kwargs)
  File "/var/spool/burp/lib/python2.7/site-packages/burpui/routes.py", line 430, in client_json
    j = bui.cli.get_client(name, agent=server)
  File "/var/spool/burp/lib/python2.7/site-packages/burpui/misc/backend/burp1.py", line 608, in get_client
    log = self.get_backup_logs(sp[0], name)
  File "/var/spool/burp/lib/python2.7/site-packages/burpui/misc/backend/burp1.py", line 260, in get_backup_logs
    ret = self._parse_backup_log(f, number, cl, agent=agent)
  File "/var/spool/burp/lib/python2.7/site-packages/burpui/misc/backend/burp1.py", line 471, in _parse_backup_log
    'total':     int(sp[4]),
IndexError: list index out of range

i think i have the correct versions. both burp and burp-ui were just compiled from git. i think i'm missing something obvious.

(burp)root@ratchet:/var/spool/burp# burp-ui -V
burp-ui: v0.0.6
(burp)root@ratchet:/var/spool/burp# burp -v
burp-1.4.32