A test authorization for cadrewiki.rangerhq.net to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
75.149.60.248: Fetching http://cadrewiki.rangerhq.net/.well-known/acme-challenge/12rVU4_5K7eFZwq6bZu5S_88G4RuV9dT49O7FMB-wsw: Timeout during connect (likely firewall problem)