Set up your WordPress website - new

The error message in the image indicates that the SSL/TLS certificate validation failed during the WordPress setup process on your Lightsail instance. This could be due to a reason of Incorrect DNS configuration. Even though you have checked them multiple times, there may be a configuration issue with your DNS records. Double-check that your A record points to your Lightsail instance's public IP address, and that your CNAME record (if you're using one) points to your domain name. You can find instructions on how to configure DNS records for your specific domain registrar by searching the web.

Lightsail Quick Start guide: WordPress: https://docs.aws.amazon.com/lightsail/latest/userguide/amazon-lightsail-tutorial-launching-and-configuring-wordpress.html

Enable HTTPS on your WordPress instance in Lightsail: https://docs.aws.amazon.com/lightsail/latest/userguide/amazon-lightsail-enabling-https-on-wordpress.html

Hi,

If you have a 3rd party registered domain and seem to be using Lightsail DNS zone, have you updated the name servers at the domain registrar to match the name servers provided by the Lightsail DNS zone?

After the name server update is made, it can take few minutes to few days for the change to actually take effect depending on the domain's TLD, original registrar, etc.

You can check if the name servers are updated by running this command ->

dig NS <replace-with-your-domain-name>

and verify that the name-servers returned match those of the Lightsail DNS zone.

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With regards to

The attached image says wordpress isn't working but it is.

That message is not related to the cause for the SSL-setup to fail but is instead stating a possible outcome of the setup having failed. Meaning, set up did NOT fail because WordPress isn't running, but WordPress may have stopped working, because changes during setup impacted it.

If you find WordPress is working, please ignore that messaging as it doesn't apply in your case.

Thanks.