Status_check.py error

[prostream]

I´m getting this error while running ./management/status_checks.py

System
======
✓  All system services are running.
✖  The SSH server on this machine permits password-based login. A more secure way to log in is using a public key. Add your SSH public key to $HOME/.ssh/authorized_keys, check that you can log in without a password, set the option
   'PasswordAuthentication no' in /etc/ssh/sshd_config, and then restart the openssh via 'sudo service ssh restart'.
✓  System software is up to date.
✓  Mail-in-a-Box is up to date. You are running version v0.27.
✓  System administrator address exists as a mail alias. [administrator@box.mybox.com ↦ me@mybox.com]
✓  The disk has 131.18 GB space remaining.
✓  System memory is 83% free.

Network
=======
✓  Firewall is active.
✓  Outbound mail (SMTP port 25) is not blocked.
✓  IP address is not blacklisted by zen.spamhaus.org.
multiprocessing.pool.RemoteTraceback:
"""
Traceback (most recent call last):
  File "/usr/lib/python3.4/multiprocessing/pool.py", line 119, in worker
    result = (True, func(*args, **kwds))
  File "/usr/lib/python3.4/multiprocessing/pool.py", line 47, in starmapstar
    return list(itertools.starmap(args[0], args[1]))
  File "./management/status_checks.py", line 356, in run_domain_checks_on_domain
    check_dns_zone_suggestions(domain, env, output, dns_zonefiles, domains_with_a_records)
  File "./management/status_checks.py", line 515, in check_dns_zone_suggestions
    check_dnssec(domain, env, output, dns_zonefiles)
  File "./management/status_checks.py", line 527, in check_dnssec
    ds_keytag, ds_alg, ds_digalg, ds_digest = rr_ds.split("\t")[4].split(" ")
IndexError: list index out of range
"""

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "./management/status_checks.py", line 983, in <module>
    run_checks(False, env, ConsoleOutput(), pool)
  File "./management/status_checks.py", line 65, in run_checks
    run_domain_checks(rounded_values, env, output, pool)
  File "./management/status_checks.py", line 323, in run_domain_checks
    ret = pool.starmap(run_domain_checks_on_domain, args, chunksize=1)
  File "/usr/lib/python3.4/multiprocessing/pool.py", line 268, in starmap
    return self._map_async(func, iterable, starmapstar, chunksize).get()
  File "/usr/lib/python3.4/multiprocessing/pool.py", line 599, in get
    raise self._value
IndexError: list index out of range

Does anyone know why?