I've had certbot setup for a couple of months for managing my
certificates, one of my certificates was recently replaced on 24-01-2018,

but now I'm getting a errors when it tries to replace my cert:

(http-01): urn:acme:error:unauthorized :: The client lacks sufficient
authorization :: Invalid response from , my permissions on the directories

are correct and my DNS entries were working with it when I first set it
up. When I check the certbot logs I see a traceback call:

Traceback (most recent call last):
  File "/usr/bin/certbot", line 9, in <module>
    load_entry_point('certbot==0.20.0', 'console_scripts', 'certbot')()
  File "/usr/lib/python2.7/site-packages/certbot/main.py", line 861, in main
    return config.func(config, plugins)
  File "/usr/lib/python2.7/site-packages/certbot/main.py", line 786, in
certonly
    lineage = _get_and_save_cert(le_client, config, domains, certname,
lineage)
  File "/usr/lib/python2.7/site-packages/certbot/main.py", line 80, in
_get_and_save_cert
    renewal.renew_cert(config, domains, le_client, lineage)
  File "/usr/lib/python2.7/site-packages/certbot/renewal.py", line 297,
in renew_cert
    new_certr, new_chain, new_key, _ = le_client.obtain_certificate(domains)
  File "/usr/lib/python2.7/site-packages/certbot/client.py", line 318,
in obtain_certificate
    self.config.allow_subset_of_names)
  File "/usr/lib/python2.7/site-packages/certbot/auth_handler.py", line
81, in get_authorizations
    self._respond(resp, best_effort)
  File "/usr/lib/python2.7/site-packages/certbot/auth_handler.py", line
138, in _respond
    self._poll_challenges(chall_update, best_effort)
  File "/usr/lib/python2.7/site-packages/certbot/auth_handler.py", line
202, in _poll_challenges
    raise errors.FailedChallenges(all_failed_achalls)

Anyone else here using certbot and been running into this problem?