www.devconexus.nl has an A (IPv4) record (84.22.102.228) but a request to this address over port 80 did not succeed. Your web server must have at least one working IPv4 or IPv6 address.
Get http://www.devconexus.nl/.well-known/acme-challenge/letsdebug-test: dial tcp 84.22.102.228:80: connect: no route to host
Trace:
@0ms: Making a request to http://www.devconexus.nl/.well-known/acme-challenge/letsdebug-test (using initial IP 84.22.102.228)
@0ms: Dialing 84.22.102.228
@76ms: Experienced error: dial tcp 84.22.102.228:80: connect: no route to host
A test authorization for www.devconexus.nl to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
Fetching http://www.devconexus.nl/.well-known/acme-challenge/oKOtGy3hNFuRs1Ir-dhDfb5ioHy__IJC0DDRkUX07Lg: Error getting validation data