And below is the error log:
2020-02-24 23:37:19,670:DEBUG:certbot._internal.main:certbot version: 1.2.0
2020-02-24 23:37:19,675:DEBUG:certbot._internal.main:Arguments: ['--standalone', '--renew-by-default', '--email', '[redacted]', '--agree-tos', '--text', '--preferred-challenges', 'http', '-d', 'admin.freeflys.com']
2020-02-24 23:37:19,676:DEBUG:certbot._internal.main:Discovered plugins: PluginsRegistry(PluginEntryPoint#apache,PluginEntryPoint#manual,PluginEntryPoint#nginx,PluginEntryPoint#null,PluginEntryPoint#standalone,PluginEntryPoint#webroot)
2020-02-24 23:37:19,709:DEBUG:certbot._internal.log:Root logging level set at 20
2020-02-24 23:37:19,710:INFO:certbot._internal.log:Saving debug log to /var/log/letsencrypt/letsencrypt.log
2020-02-24 23:37:19,711:DEBUG:certbot._internal.plugins.selection:Requested authenticator standalone and installer None
2020-02-24 23:37:19,721:DEBUG:certbot._internal.plugins.selection:Single candidate plugin: * standalone
Description: Spin up a temporary webserver
Interfaces: IAuthenticator, IPlugin
Entry point: standalone = certbot._internal.plugins.standalone:Authenticator
Initialized: <certbot._internal.plugins.standalone.Authenticator object at 0x7f3e495fd630>
Prep: True
2020-02-24 23:37:19,723:DEBUG:certbot._internal.plugins.selection:Selected authenticator <certbot._internal.plugins.standalone.Authenticator object at 0x7f3e495fd630> and installer None
2020-02-24 23:37:19,723:INFO:certbot._internal.plugins.selection:Plugins selected: Authenticator standalone, Installer None
2020-02-24 23:37:19,731:DEBUG:certbot._internal.main:Picked account: <Account(RegistrationResource(body=Registration(key=JWKRSA(key=<ComparableRSAKey(<cryptography.hazmat.backends.openssl.rsa._RSAPublicKey object at 0x7f3e4956be48>)>), contact=('mailto:root@admin.surveypanelgroup.com',), agreement='https://letsencrypt.org/documents/LE-SA-v1.0.1-July-27-2015.pdf', status=None, terms_of_service_agreed=None, only_return_existing=None, external_account_binding=None), uri='https://acme-v01.api.letsencrypt.org/acme/reg/937868', new_authzr_uri='https://acme-v01.api.letsencrypt.org/acme/new-authz', terms_of_service='https://letsencrypt.org/documents/LE-SA-v1.0.1-July-27-2015.pdf'), a2fb27f74862605a9da016f550d96eaf, Meta(creation_dt=datetime.datetime(2016, 3, 21, 22, 23, 42, tzinfo=<UTC>), creation_host='mws1.trancos.com'))>
2020-02-24 23:37:19,734:DEBUG:acme.client:Sending GET request to https://acme-v02.api.letsencrypt.org/directory.
2020-02-24 23:37:19,738:DEBUG:urllib3.connectionpool:Starting new HTTPS connection (1): acme-v02.api.letsencrypt.org:443
2020-02-24 23:37:19,906:DEBUG:urllib3.connectionpool:https://acme-v02.api.letsencrypt.org:443 "GET /directory HTTP/1.1" 200 658
2020-02-24 23:37:19,907:DEBUG:acme.client:Received response:
HTTP 200
Server: nginx
Date: Tue, 25 Feb 2020 07:37:19 GMT
Content-Type: application/json
Content-Length: 658
Connection: keep-alive
Cache-Control: public, max-age=0, no-cache
X-Frame-Options: DENY
Strict-Transport-Security: max-age=604800
{
"0cGFK2-kBzM": "https://community.letsencrypt.org/t/adding-random-entries-to-the-directory/33417",
"keyChange": "https://acme-v02.api.letsencrypt.org/acme/key-change",
"meta": {
"caaIdentities": [
"letsencrypt.org"
],
"termsOfService": "https://letsencrypt.org/documents/LE-SA-v1.2-November-15-2017.pdf",
"website": "https://letsencrypt.org"
},
"newAccount": "https://acme-v02.api.letsencrypt.org/acme/new-acct",
"newNonce": "https://acme-v02.api.letsencrypt.org/acme/new-nonce",
"newOrder": "https://acme-v02.api.letsencrypt.org/acme/new-order",
"revokeCert": "https://acme-v02.api.letsencrypt.org/acme/revoke-cert"
}
2020-02-24 23:37:19,919:DEBUG:certbot._internal.renewal:Auto-renewal forced with --force-renewal...
2020-02-24 23:37:19,919:INFO:certbot._internal.main:Renewing an existing certificate
2020-02-24 23:37:20,077:DEBUG:certbot.crypto_util:Generating key (2048 bits): /etc/letsencrypt/keys/0067_key-certbot.pem
2020-02-24 23:37:20,081:DEBUG:certbot.crypto_util:Creating CSR: /etc/letsencrypt/csr/0067_csr-certbot.pem
2020-02-24 23:37:20,082:DEBUG:acme.client:Requesting fresh nonce
2020-02-24 23:37:20,082:DEBUG:acme.client:Sending HEAD request to https://acme-v02.api.letsencrypt.org/acme/new-nonce.
2020-02-24 23:37:20,122:DEBUG:urllib3.connectionpool:https://acme-v02.api.letsencrypt.org:443 "HEAD /acme/new-nonce HTTP/1.1" 200 0
2020-02-24 23:37:20,123:DEBUG:acme.client:Received response:
HTTP 200
Server: nginx
Date: Tue, 25 Feb 2020 07:37:20 GMT
Connection: keep-alive
Cache-Control: public, max-age=0, no-cache
Link: <https://acme-v02.api.letsencrypt.org/directory>;rel="index"
Replay-Nonce: 0001oprDzVa0IYsx7TSBrYqXGwZ6GDLJYRhxkC30NGsnhL