Let's Debug

Test result for ci.possumlab.com using http-01

Debug
Requests made to the domain
Request to: ci.possumlab.com/23.99.134.161, Result: [Address Type=IPv4,Server=nginx/1.15.10,HTTP Status=308,Number of Redirects=1,Final HTTP Status=200], Issue:
Trace:
@0ms: Making a request to http://ci.possumlab.com/.well-known/acme-challenge/letsdebug-test (using initial IP 23.99.134.161)
@0ms: Dialing 23.99.134.161
@80ms: Server response: HTTP 308 Permanent Redirect
@81ms: Received redirect to https://ci.possumlab.com/.well-known/acme-challenge/letsdebug-test
@81ms: Dialing 23.99.134.161
@301ms: Server response: HTTP 200 OK

Debug
A and AAAA records found for this domain
ci.possumlab.com. 0 IN A 23.99.134.161
Challenge update failures for ci.possumlab.com in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/36720706
acme: error code 403 "urn:ietf:params:acme:error:unauthorized": Invalid response from https://ci.possumlab.com/.well-known/acme-challenge/OCCV-sMP3HpPvcgT56KV3u3AapaJX-DP3_NNhxup4j8 [23.99.134.161]: "<!doctype html>\n<html lang=\"en\">\n<head>\n<link href=\"https://fonts.googleapis.com/icon?family=Material+Icons\" rel=\"stylesheet\">\n<"
Debug
The IANA public suffix is the TLD of the Registered Domain
The TLD for ci.possumlab.com is: com
Debug
2 Certificates contributing to rate limits for this domain

Serial: 352801935096363300906469068095856571228770
NotBefore: 2019-06-07 11:30:55 +0000 UTC
Names: [ci.possumlab.com]

Serial: 343765569508888849426945740863490946908420
NotBefore: 2019-06-07 03:48:17 +0000 UTC
Names: [ci.possumlab.com]

Debug
The current status.io status for Let's Encrypt
Operational

Submitted Jun 7 12:46:01 2019. Sat in queue for 7ms. Completed in 6s. Hide verbose information.