I’m getting the above error message when connecting to the website from my home network, changing the browser didn’t help. On a mobile network, it connects at https://ekholm.kim without issue. It also connects by bypassing SSL, ie forcing HTTP on my home network, but that isn’t really a viable solution.
My site name is kimekholm, custom domain is ekholm.kim.
I found some earlier posts with the same issue here (especially this one, Some users keep getting ERR_SSL_PROTOCOL_ERROR and unable to access Netlify site, however, running Curl returned a different error message) but didn’t find any solution to it so here is some of the data I grabbed by following those diagnosis suggestions.
Clicking the “lock” or information button in this case gives no other info than that the site does not have SSL.
running curl ekholm.kim returns:
Trying 185.27.134.134:443…
* Connected to ekholm.kim (185.27.134.134) port 443 (#0)
* schannel: disabled automatic use of client certificate
* ALPN: offers http/1.1
* schannel: next InitializeSecurityContext failed: SEC_E_ILLEGAL_MESSAGE (0x80090326) - This error usually occurs when a fatal SSL/TLS alert is received (e.g. handshake failed). More detail may be available in the Windows System event log.
* Closing connection 0
curl: (35) schannel: next InitializeSecurityContext failed: SEC_E_ILLEGAL_MESSAGE (0x80090326) - This error usually occurs when a fatal SSL/TLS alert is received (e.g. handshake failed). More detail may be available in the Windows System event log.
Windows system event log gives no further information.