When building my own server, I want to check "Use https proxy" but unfortunately, I have to fill the field "Listen port server". Is it correct to put the 443 value in this field ? Of course, I have tried

but my linux repeater complains about bad Id
UltraVnc> ParseHTTPSId(): IdCode format error, does not start ID?:
UltraVnc> accept_connection(): ParseId returned error
any tips ?