As the browser's error message says, your server's certificate doesn't prove that 127.0.0.1 and mycomputer are the same entity, so the browser fails the handshake. Did you try connecting to https://mycomputer:4567 instead? The certificate you have is registered to a hostname, so that hostname must be specified in the URL used to access the server.
See: Is it possible to have SSL certificate for IP address, not domain name?