Single license server not answering to safari on Sierra

Can’t establish secure connection to localhost,

a curl with the same url results in
curl: (35) error:1400410B:SSL routines:CONNECT_CR_SRVR_HELLO:wrong version number

Any suggestions?

Sorry, I have no idea what you’re asking about.
Is this a problem with using the LAN Zoo floating license manager or a Cloud Zoo license issue?