Troubleshoot SSL certificate configuration failures

If an error occurs when you enable HTTPS, verify that your DNS resolution is configured correctly.

This example uses a www subdomain purchased from Alibaba Cloud.

Log on to Alibaba Cloud, go to the domain name list, and click resolution next to your domain name.

Verify that there is only one CNAME record for the WWW host record. Its record value must match the one from your website's backend. Delete any other A or CNAME records for the WWW host record.

In the left-side navigation pane of your website's backend, click domain management. Find the resolution record value for your domain, which is a CNAME value ending in kunluncan.com. Compare this value with the CNAME record value configured in Alibaba Cloud.

After confirming that the DNS resolution is correct, return to your website's backend and enable HTTPS.