The domain woollastudio.com is being served through Cloudflare CDN. Any Let's Encrypt certificate installed on the origin server will only encrypt traffic between the server and Cloudflare. It is strongly recommended that the SSL option 'Full SSL (strict)' be enabled.
https://support.cloudflare.com/hc/en-us/articles/200170416-What-do-the-SSL-options-mean-
Requests made to the domain
Request to: woollastudio.com/23.227.38.66, Result: [Address=23.227.38.66,Address Type=IPv4,Server=cloudflare,HTTP Status=404], Issue:
Trace:
@0ms: Making a request to http://woollastudio.com/.well-known/acme-challenge/letsdebug-test (using initial IP 23.227.38.66)
@0ms: Dialing 23.227.38.66
@231ms: Server response: HTTP 404 Not Found
A and AAAA records found for this domain
woollastudio.com. 0 IN A 23.227.38.66
Challenge update failures for woollastudio.com in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/4256769174
acme: error code 403 "urn:ietf:params:acme:error:unauthorized": 23.227.38.66: Invalid response from http://woollastudio.com/.well-known/acme-challenge/ogmkFW1JU1p1uA_atFIabMi_b4hwirBO49isxB0L8LY: 404
The IANA public suffix is the TLD of the Registered Domain
The TLD for woollastudio.com is: com
The current status.io status for Let's Encrypt
Operational