Sending an ACME HTTP validation request to www.imagesvanuatu.com results in an unacceptable redirect. This is most likely a misconfiguration of your web server or your web application.
It appears that a redirect was generated by your web server that is missing a trailing slash after your domain name: https://imagesvanuatu.com.well-known/acme-challenge/letsdebug-test. Check your web server configuration and .htaccess for Redirect/RedirectMatch/RewriteRule.
Trace:
@0ms: Making a request to http://www.imagesvanuatu.com/.well-known/acme-challenge/letsdebug-test (using initial IP 13.210.87.234)
@0ms: Dialing 13.210.87.234
@566ms: Server response: HTTP 302 Found
@566ms: Received redirect to https://imagesvanuatu.com.well-known/acme-challenge/letsdebug-test
A test authorization for www.imagesvanuatu.com to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
Fetching https://imagesvanuatu.com.well-known/acme-challenge/xiASZDkSEQ_PD9xuU1WpSOMDx41hdHfEup92iigiyHs: Error getting validation data
Requests made to the domain
Request to: www.imagesvanuatu.com/13.210.87.234, Result: [Address Type=IPv4,Server=Apache,HTTP Status=302,Number of Redirects=1,Final HTTP Status=302], Issue: BadRedirect
Trace:
@0ms: Making a request to http://www.imagesvanuatu.com/.well-known/acme-challenge/letsdebug-test (using initial IP 13.210.87.234)
@0ms: Dialing 13.210.87.234
@566ms: Server response: HTTP 302 Found
@566ms: Received redirect to https://imagesvanuatu.com.well-known/acme-challenge/letsdebug-test
A and AAAA records found for this domain
www.imagesvanuatu.com. 0 IN A 13.210.87.234
Challenge update failures for www.imagesvanuatu.com in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/16250420
acme: error code 400 "urn:ietf:params:acme:error:connection": Fetching https://imagesvanuatu.com.well-known/acme-challenge/xiASZDkSEQ_PD9xuU1WpSOMDx41hdHfEup92iigiyHs: Error getting validation data
The IANA public suffix is the TLD of the Registered Domain
The TLD for www.imagesvanuatu.com is: com
The current status.io status for Let's Encrypt
Operational