Failed authorization procedure. The server experienced - - [05/Nov/2015 18:45:24] "GET /.well-known/acme-challenge/MSMkci4W8m3ut6tgiwYajx77sZdBM75yUPqzQupx_CU HTTP/1.1" 200 -
Failed authorization procedure. (dvsni): tls :: The server experienced a TLS error during DV :: Failed to connect to host for DVSNI challenge

 - The following 'tls' errors were reported by the server:

   Error: The server experienced a TLS error during DV

   To fix these errors, please make sure that your domain name was
   entered correctly and the DNS A record(s) for that domain
   contain(s) the right IP address. Additionally, please check that
   you have an up-to-date TLS configuration that allows the server to
   communicate with the Let's Encrypt client

This happens for every my domain. For, and A record binds correctly to VPS (provider: OVH).

I don’t know how, but it works now. Probably it needed some time.