Does the appliance use certbot?
Does the appliance use Apache?
curl -Ii supportusa.skidata.com/.well-known/acme-challenge/Test-File-1234
HTTP/1.1 404 Not Found
Date: Thu, 21 Oct 2021 16:27:02 GMT
Server: Apache
Strict-Transport-Security: max-age=31536000
Content-Type: text/html; charset=iso-8859-1