Error ssl ERR_SPDY

error ERR_SPDY_INADEQUATE_TRANSPORT_SECURITY
https://marcocassol.com.br/

root@vps:~# ee site update marcocassol.com.br --letsencrypt=on
Letsencrypt is currently in beta phase.
Do you wish to enable SSl now for marcocassol.com.br?
Type “y” to continue [n]:y
Added HTTPS Force Redirection for Site http://marcocassol.com.br
Creating Cron Job for cert auto-renewal
Reload : nginx [OK]
Congratulations! Successfully Configured SSl for Site https://marcocassol.com.br
Your cert will expire within 89 days.
root@vps:~#