efficiency-inc.nl has an A (IPv4) record (83.83.165.172) 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://efficiency-inc.nl/.well-known/acme-challenge/letsdebug-test": dial tcp 83.83.165.172:80: connect: connection refused
Trace:
@0ms: Making a request to http://efficiency-inc.nl/.well-known/acme-challenge/letsdebug-test (using initial IP 83.83.165.172)
@0ms: Dialing 83.83.165.172
@259ms: Experienced error: dial tcp 83.83.165.172:80: connect: connection refused
A test authorization for efficiency-inc.nl to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
83.83.165.172: Fetching http://efficiency-inc.nl/.well-known/acme-challenge/x0-6Y-tm-eqjsJbNnw_px3zlk6YBcoBFpLloxEKcyVU: Connection refused