Same problem here. I've tried several servers runs CWP none of them working.
According to lets debug there is no error but log files shows cant access to token folders (.well-known) and folders not generated.
{
"type": "http-01",
"status": "invalid",
"error": {
"type": "urn:ietf:params:acme:error:unauthorized",
"detail": "Invalid response from http://e-fotograf.com/.well-known/acme-challenge/5A_xUz3Amshb91cENqsgbYR9cVlQ2XNpPKZ8s0VTthM [80.93.209.85]: \"\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
},
"url": "https://acme-v02.api.letsencrypt.org/acme/chall-v3/10318131346/mxIztg",
"token": "5A_xUz3Amshb91cENqsgbYR9cVlQ2XNpPKZ8s0VTthM",
"validationRecord": [
{
"url": "http://e-fotograf.com/.well-known/acme-challenge/5A_xUz3Amshb91cENqsgbYR9cVlQ2XNpPKZ8s0VTthM",
"hostname": "e-fotograf.com",
"port": "80",
"addressesResolved": [
"80.93.209.85"
],
"addressUsed": "80.93.209.85"
}
]
}