Failed Authorization


When trying to run the client on my Ubuntu 14.04 server, I get the error below:

Failed authorization procedure. (tls-sni-01): urn:acme:error:unauthorized :: The client lacks sufficient authorization :: Correct zName not found for TLS SNI challenge. Found dummy, c2582bfd2807a7cc1da8546acd1c8680.4ae9990addeacb4d6f00934eb67da0a1.acme.invalid


  • The following ‘urn:acme:error:unauthorized’ errors were reported by
    the server:

    Error: The client lacks sufficient authorization

What can I do to resolve this?


Looking at your domain, you have correctly got an LE cert on it, so I assume you have overcome that issue.


If you got it solved, then how, because I’m stuck on the same issue


This is usually because the file in your-domain/.well-known/acme-challenge can not be reached from the web for some reason.

I’d try putting a file in .well-known/acme-challenge and checking if you can reach it in your browser