There seems to be an issue with the SSL Certificate itself. Please see the output of the openssl command:
openssl s_client -connect oma-winch.com:443
140693040660928:error:1408F10B:SSL routines:ssl3_get_record:wrong version number:../ssl/record/ssl3_record.c:332:
no peer certificate available
No client certificate CA names sent
SSL handshake has read 5 bytes and written 315 bytes
New, (NONE), Cipher is (NONE)
Secure Renegotiation IS NOT supported
No ALPN negotiated
Early data was not sent
Verify return code: 0 (ok)
Can you please double check that your certificate has been installed successfully and check if the apache virtual host is loading the correct ssl files as well?
Let me know how it goes.