Unable to renew certbot with dockers

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Schoen: I reinstalled certbot using apt update and this time it began the renewal process but gave the following error:

Saving debug log to /var/log/letsencrypt/letsencrypt.log

-------------------------------------------------------------------------------
Processing /etc/letsencrypt/renewal/hudddle.io.conf
-------------------------------------------------------------------------------
Cert is due for renewal, auto-renewing...
Plugins selected: Authenticator nginx, Installer nginx
Starting new HTTPS connection (1): acme-v01.api.letsencrypt.org
Renewing an existing certificate
Performing the following challenges:
tls-sni-01 challenge for hudddle.io
tls-sni-01 challenge for www.hudddle.io
nginx: [error] invalid PID number "" in "/run/nginx.pid"
Cleaning up challenges
nginx: [error] invalid PID number "" in "/run/nginx.pid"
Encountered exception during recovery
nginx restart failed:
b''
b''
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/certbot/auth_handler.py", line 115, in _solve_challenges
    resp = self.auth.perform(self.achalls)
  File "/usr/lib/python3/dist-packages/certbot_nginx/configurator.py", line 865, in perform
    self.restart()
  File "/usr/lib/python3/dist-packages/certbot_nginx/configurator.py", line 680, in restart
    nginx_restart(self.conf('ctl'), self.nginx_conf)
  File "/usr/lib/python3/dist-packages/certbot_nginx/configurator.py", line 926, in nginx_restart
    "nginx restart failed:\n%s\n%s" % (out.read(), err.read()))
certbot.errors.MisconfigurationError: nginx restart failed:
b''
b''

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/certbot/error_handler.py", line 100, in _call_registered
    self.funcs[-1]()
  File "/usr/lib/python3/dist-packages/certbot/auth_handler.py", line 284, in _cleanup_challenges
    self.auth.cleanup(achalls)
  File "/usr/lib/python3/dist-packages/certbot_nginx/configurator.py", line 884, in cleanup
    self.restart()
  File "/usr/lib/python3/dist-packages/certbot_nginx/configurator.py", line 680, in restart
    nginx_restart(self.conf('ctl'), self.nginx_conf)
  File "/usr/lib/python3/dist-packages/certbot_nginx/configurator.py", line 926, in nginx_restart
    "nginx restart failed:\n%s\n%s" % (out.read(), err.read()))
certbot.errors.MisconfigurationError: nginx restart failed:
b''
b''
Attempting to renew cert (hudddle.io) from /etc/letsencrypt/renewal/hudddle.io.conf produced an unexpected error: nginx restart failed:
b''
b''. Skipping.
All renewal attempts failed. The following certs could not be renewed:
  /etc/letsencrypt/live/hudddle.io/fullchain.pem (failure)

-------------------------------------------------------------------------------

All renewal attempts failed. The following certs could not be renewed:
  /etc/letsencrypt/live/hudddle.io/fullchain.pem (failure)
-------------------------------------------------------------------------------
1 renew failure(s), 0 parse failure(s)

Any suggestions?