i'm really sorry for starting a new thread with this error message but the existing threads don't help me.
I started to develop my skills with a Azure testaccount. Everything was fine. Now my test time is over and i installed an lokal IIS Server.
I published my Service (which was running with Azure) on my IIS and configured it with a StartSSL subdomain certifitacte.
When i call it over the alexa testinterface i get the Error message from the Topic. The alexa-app response said "Unable to resolve hostename for endpoint Resource. When i call it with an TestClient, or Fiddler the response is correct and the name is resolved without any error.
The Server IP is an IPv6, with IIS10. I have read, that the StartSSL certificate is not trusted on some browsers anymore, but i get the same error by using a certificat from comodo or a self-signed certificate from openSSH.
Hope someone has an idea :-)