3.2 KiB
Troubleshoot datacenter server https error
Setup
The datacenter server is maintained with Virtualmin. The domain causing the problem is "kipurchat.creature-go.com". The SSL certificate provider is Let's Encrypt.
Problem
When trying to open "kipurchat.creature-go.com" the web browser shows this error (first section and certificates cut out):
net::ERR_CERT_DATE_INVALID
Subject: kipurchat.creature-go.com
Issuer: R13
Expires on: 28.01.2026
Current date: 14.03.2026
Certificate Transparency:
SCT Google 'Argon2026h1' log (Embedded in certificate, Verified)
SCT Let's Encrypt 'Oak2026h1' (Embedded in certificate, Verified)
First own troubleshooting
The Virtualmin webpage SSL Certificate In domain kipurchat.creature-go.com shows that renewal of the certificate failed: " SSL certificate providers like Let's Encrypt can be used to automatically request a valid cert for use by Virtualmin. This page can be used to request a new certificate, which will overwrite any other you currently have configured for this domain. However, SSL certificate providers require that your ownership of the certificate domain be validated by checking that this system hosts the website for the domain. This is done by placing a small temporary file under the website's document directory /home/admincg/domains/kipurchat.creature-go.com/public_html.
Request certificate for
Domains associated with this server kipurchat.creature-go.com
Domain names listed here
Also request wildcard certificate? SSL certificate provider Let's Encrypt Automatically renew certificate
Yes
No Send email on renewal
Yes
Only on failure
No Hostname verification
Attempt to request all hostnames, and fail if any cannot be validated
Skip unresolvable hostnames, but fail if any remaining cannot be validated
Exclude hostnames that cannot be validated from the certifcate Certificate hash type
RSA Time since last renewal 0.00 months Last failed renewal 03/14/2026 11:39 AM Renewal failed due to Web-based validation failed : Saving debug log to /var/log/letsencrypt/letsencrypt.log Renewing an existing certificate for kipurchat.creature-go.com An unexpected error occurred: AttributeError: can't set attribute Ask for help or search for solutions at https://community.letsencrypt.org. See the logfile /var/log/letsencrypt/letsencrypt.log or re-run Certbot with -v for more details. DNS-based validation failed : Saving debug log to /var/log/letsencrypt/letsencrypt.log Renewing an existing certificate for kipurchat.creature-go.com An unexpected error occurred: AttributeError: can't set attribute Ask for help or search for solutions at https://community.letsencrypt.org. See the logfile /var/log/letsencrypt/letsencrypt.log or re-run Certbot with -v for more details. "
Your tasks
Please help me by running these tasks:
Understand the root cause
Why did the certificate renewal fail?
Repair the SSL certificate setup
Change the SSL certificate setup so that future renewals will work.
Repair SSL connection
If not already done by completing the task before, repair the SSL connection so that "kipurchat.creature-go.com" can be used again.