Hello,
Those functions are deprecated on the latest versions of openssl and only must be used on openSSL 1.0.2, so if you are using openssl 1.1.1 or 3.0.0 those functions are not available, this is not related to sgcIndy.
You should contact the developer of DelphiACME and ask for support for the latest openssl versions, most probably is using 1.0.2
Kind Regards,
Sergio