technet.ovh has an AAAA (IPv6) record (2001:41d0:305:2100::4a79) but a test request to this address over port 80 did not succeed. Let's Encrypt will prefer to use AAAA records, if present, and will not fall back to IPv4 records. You should either ensure that validation requests to this domain succeed over IPv6, or remove its AAAA record.
A timeout was experienced while communicating with technet.ovh/2001:41d0:305:2100::4a79: Get http://technet.ovh/.well-known/acme-challenge/letsdebug-test: context deadline exceeded
Trace:
@0ms: Making a request to http://technet.ovh/.well-known/acme-challenge/letsdebug-test (using initial IP 2001:41d0:305:2100::4a79)
@0ms: Dialing 2001:41d0:305:2100::4a79
@10000ms: Experienced error: context deadline exceeded
Requests made to the domain
Request to: technet.ovh/2001:41d0:305:2100::4a79, Result: [Address Type=IPv6,Server=,HTTP Status=0], Issue: AAAANotWorking
Trace:
@0ms: Making a request to http://technet.ovh/.well-known/acme-challenge/letsdebug-test (using initial IP 2001:41d0:305:2100::4a79)
@0ms: Dialing 2001:41d0:305:2100::4a79
@10000ms: Experienced error: context deadline exceeded
Request to: technet.ovh/51.75.29.64, Result: [Address Type=IPv4,Server=Apache/2.4.25 (Raspbian),HTTP Status=404], Issue:
Trace:
@0ms: Making a request to http://technet.ovh/.well-known/acme-challenge/letsdebug-test (using initial IP 51.75.29.64)
@0ms: Dialing 51.75.29.64
@189ms: Server response: HTTP 404 Not Found
A and AAAA records found for this domain
technet.ovh. 0 IN A 51.75.29.64
technet.ovh. 0 IN AAAA 2001:41d0:305:2100::4a79
Challenge update failures for technet.ovh in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/9183769
acme: error code 403 "urn:ietf:params:acme:error:unauthorized": Invalid response from http://technet.ovh/.well-known/acme-challenge/dqoE3TcK2aczm87MS8j2OE1vdlpapQN4Zo6tLJZUdo4: "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">\n<html><head>\n<title>404 Not Found</title>\n</head><body>\n<h1>Not Found</h1>\n<p"
The IANA public suffix is the TLD of the Registered Domain
The TLD for technet.ovh is: ovh
The current status.io status for Let's Encrypt
Operational