The domain ssltesting.notionjoy.io 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: ssltesting.notionjoy.io/54.213.241.126, Result: [Address=54.213.241.126,Address Type=IPv4,Server=nginx,HTTP Status=404], Issue:
Trace:
@0ms: Making a request to http://ssltesting.notionjoy.io/.well-known/acme-challenge/letsdebug-test (using initial IP 54.213.241.126)
@0ms: Dialing 54.213.241.126
@240ms: Server response: HTTP 404 Not Found
A and AAAA records found for this domain
ssltesting.notionjoy.io. 0 IN A 54.213.241.126
Challenge update failures for ssltesting.notionjoy.io in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/436162868
acme: error code 403 "urn:ietf:params:acme:error:unauthorized": Invalid response from http://ssltesting.notionjoy.io/.well-known/acme-challenge/lasqJ1Ywz-jFSiI5ytQQma5OCp2A_WRNPtCWgYuT0ko [54.213.241.126]: "{\"name\":\"Route Not Found\",\"message\":\"Route Not Found\",\"error\":\"Route Not Found\",\"error_description\":\"Route Not Found\",\"error_cod"
The IANA public suffix is the TLD of the Registered Domain
The TLD for ssltesting.notionjoy.io is: io
The current status.io status for Let's Encrypt
Operational