ERROR: Challenge is invalid! (returned: invalid) (result: {
  "type": "http-01",
  "status": "invalid",
  "error": {
    "type": "urn:acme:error:unauthorized",
    "detail": "Invalid response from http://www.pogge-online.de/.well-known/acme-challenge/EfY_olIx0PQUXOKQSvR5E9Hfg9XbDR88mfAkev31ZiY: \"\u003c!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\"\u003e\n\u003chtml\u003e\u003chead\u003e\n\u003ctitle\u003e404 Not Found\u003c/title\u003e\n\u003c/head\u003e\u003cbody\u003e\n\u003ch1\u003eNot Found\u003c/h1\u003e\n\u003cp\"",
    "status": 403
  },
  "uri": "https://acme-v01.api.letsencrypt.org/acme/challenge/cgloMHyxE4OB4LJBXwaHey2Cb9PUTciOg9AcH931ltY/1397668734",
  "token": "EfY_olIx0PQUXOKQSvR5E9Hfg9XbDR88mfAkev31ZiY",
  "keyAuthorization": "EfY_olIx0PQUXOKQSvR5E9Hfg9XbDR88mfAkev31ZiY.i8iUhbdTmRMviXEO0kV00i1EHv54HUuvdGn3B2o6llY",
  "validationRecord": [
    {
      "url": "http://www.pogge-online.de/.well-known/acme-challenge/EfY_olIx0PQUXOKQSvR5E9Hfg9XbDR88mfAkev31ZiY",
      "hostname": "www.pogge-online.de",
      "port": "80",
      "addressesResolved": [
        "84.171.248.77"
      ],
      "addressUsed": "84.171.248.77",
      "addressesTried": []
    }
  ]
})